mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
64b7cc507b
gdb_print_host_address is just a simple wrapper around fprintf_filtered. However, it is readily replaced in all callers by a combination of %s and call to host_address_to_string. This also simplifies the code, so I think it's worthwhile to remove this function. Regression tested on x86-64 Fedora 64.
3431 lines
88 KiB
C
3431 lines
88 KiB
C
/* General utility routines for GDB, the GNU debugger.
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Copyright (C) 1986-2021 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include <ctype.h>
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#include "gdbsupport/gdb_wait.h"
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#include "event-top.h"
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#include "gdbthread.h"
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#include "fnmatch.h"
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#include "gdb_bfd.h"
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#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
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#endif /* HAVE_SYS_RESOURCE_H */
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#ifdef TUI
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#include "tui/tui.h" /* For tui_get_command_dimension. */
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#endif
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#ifdef __GO32__
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#include <pc.h>
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#endif
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#include <signal.h>
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#include "gdbcmd.h"
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#include "serial.h"
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#include "bfd.h"
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#include "target.h"
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#include "gdb-demangle.h"
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#include "expression.h"
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#include "language.h"
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#include "charset.h"
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#include "annotate.h"
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#include "filenames.h"
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#include "symfile.h"
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#include "gdb_obstack.h"
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#include "gdbcore.h"
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#include "top.h"
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#include "main.h"
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#include "solist.h"
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#include "inferior.h" /* for signed_pointer_to_address */
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#include "gdb_curses.h"
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#include "readline/readline.h"
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#include <chrono>
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#include "interps.h"
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#include "gdb_regex.h"
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#include "gdbsupport/job-control.h"
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#include "gdbsupport/selftest.h"
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#include "gdbsupport/gdb_optional.h"
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#include "cp-support.h"
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#include <algorithm>
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#include "gdbsupport/pathstuff.h"
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#include "cli/cli-style.h"
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#include "gdbsupport/scope-exit.h"
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#include "gdbarch.h"
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#include "cli-out.h"
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#include "gdbsupport/gdb-safe-ctype.h"
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#include "bt-utils.h"
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void (*deprecated_error_begin_hook) (void);
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/* Prototypes for local functions */
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static void vfprintf_maybe_filtered (struct ui_file *, const char *,
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va_list, bool)
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ATTRIBUTE_PRINTF (2, 0);
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static void fputs_maybe_filtered (const char *, struct ui_file *, int);
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static void prompt_for_continue (void);
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static void set_screen_size (void);
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static void set_width (void);
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/* Time spent in prompt_for_continue in the currently executing command
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waiting for user to respond.
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Initialized in make_command_stats_cleanup.
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Modified in prompt_for_continue and defaulted_query.
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Used in report_command_stats. */
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static std::chrono::steady_clock::duration prompt_for_continue_wait_time;
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/* A flag indicating whether to timestamp debugging messages. */
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static bool debug_timestamp = false;
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/* True means that strings with character values >0x7F should be printed
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as octal escapes. False means just print the value (e.g. it's an
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international character, and the terminal or window can cope.) */
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bool sevenbit_strings = false;
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static void
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show_sevenbit_strings (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("Printing of 8-bit characters "
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"in strings as \\nnn is %s.\n"),
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value);
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}
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/* String to be printed before warning messages, if any. */
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const char *warning_pre_print = "\nwarning: ";
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bool pagination_enabled = true;
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static void
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show_pagination_enabled (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("State of pagination is %s.\n"), value);
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}
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/* Print a warning message. The first argument STRING is the warning
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message, used as an fprintf format string, the second is the
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va_list of arguments for that string. A warning is unfiltered (not
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paginated) so that the user does not need to page through each
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screen full of warnings when there are lots of them. */
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void
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vwarning (const char *string, va_list args)
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{
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if (deprecated_warning_hook)
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(*deprecated_warning_hook) (string, args);
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else
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{
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gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
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if (target_supports_terminal_ours ())
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{
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term_state.emplace ();
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target_terminal::ours_for_output ();
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}
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if (filtered_printing_initialized ())
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wrap_here (""); /* Force out any buffered output. */
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gdb_flush (gdb_stdout);
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if (warning_pre_print)
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fputs_unfiltered (warning_pre_print, gdb_stderr);
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vfprintf_unfiltered (gdb_stderr, string, args);
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fprintf_unfiltered (gdb_stderr, "\n");
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}
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}
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/* Print an error message and return to command level.
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The first argument STRING is the error message, used as a fprintf string,
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and the remaining args are passed as arguments to it. */
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void
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verror (const char *string, va_list args)
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{
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throw_verror (GENERIC_ERROR, string, args);
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}
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void
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error_stream (const string_file &stream)
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{
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error (("%s"), stream.c_str ());
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}
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/* Emit a message and abort. */
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static void ATTRIBUTE_NORETURN
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abort_with_message (const char *msg)
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{
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if (current_ui == NULL)
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fputs (msg, stderr);
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else
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fputs_unfiltered (msg, gdb_stderr);
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abort (); /* ARI: abort */
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}
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/* Dump core trying to increase the core soft limit to hard limit first. */
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void
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dump_core (void)
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{
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#ifdef HAVE_SETRLIMIT
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struct rlimit rlim = { (rlim_t) RLIM_INFINITY, (rlim_t) RLIM_INFINITY };
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setrlimit (RLIMIT_CORE, &rlim);
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#endif /* HAVE_SETRLIMIT */
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/* Ensure that the SIGABRT we're about to raise will immediately cause
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GDB to exit and dump core, we don't want to trigger GDB's printing of
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a backtrace to the console here. */
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signal (SIGABRT, SIG_DFL);
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abort (); /* ARI: abort */
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}
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/* Check whether GDB will be able to dump core using the dump_core
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function. Returns zero if GDB cannot or should not dump core.
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If LIMIT_KIND is LIMIT_CUR the user's soft limit will be respected.
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If LIMIT_KIND is LIMIT_MAX only the hard limit will be respected. */
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int
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can_dump_core (enum resource_limit_kind limit_kind)
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{
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#ifdef HAVE_GETRLIMIT
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struct rlimit rlim;
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/* Be quiet and assume we can dump if an error is returned. */
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if (getrlimit (RLIMIT_CORE, &rlim) != 0)
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return 1;
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switch (limit_kind)
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{
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case LIMIT_CUR:
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if (rlim.rlim_cur == 0)
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return 0;
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/* Fall through. */
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case LIMIT_MAX:
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if (rlim.rlim_max == 0)
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return 0;
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}
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#endif /* HAVE_GETRLIMIT */
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return 1;
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}
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/* Print a warning that we cannot dump core. */
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void
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warn_cant_dump_core (const char *reason)
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{
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fprintf_unfiltered (gdb_stderr,
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_("%s\nUnable to dump core, use `ulimit -c"
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" unlimited' before executing GDB next time.\n"),
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reason);
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}
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/* Check whether GDB will be able to dump core using the dump_core
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function, and print a warning if we cannot. */
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static int
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can_dump_core_warn (enum resource_limit_kind limit_kind,
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const char *reason)
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{
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int core_dump_allowed = can_dump_core (limit_kind);
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if (!core_dump_allowed)
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warn_cant_dump_core (reason);
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return core_dump_allowed;
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}
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/* Allow the user to configure the debugger behavior with respect to
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what to do when an internal problem is detected. */
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const char internal_problem_ask[] = "ask";
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const char internal_problem_yes[] = "yes";
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const char internal_problem_no[] = "no";
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static const char *const internal_problem_modes[] =
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{
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internal_problem_ask,
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internal_problem_yes,
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internal_problem_no,
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NULL
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};
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/* Data structure used to control how the internal_vproblem function
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should behave. An instance of this structure is created for each
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problem type that GDB supports. */
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struct internal_problem
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{
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/* The name of this problem type. This must not contain white space as
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this string is used to build command names. */
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const char *name;
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/* When this is true then a user command is created (based on NAME) that
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allows the SHOULD_QUIT field to be modified, otherwise, SHOULD_QUIT
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can't be changed from its default value by the user. */
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bool user_settable_should_quit;
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/* Reference a value from internal_problem_modes to indicate if GDB
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should quit when it hits a problem of this type. */
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const char *should_quit;
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/* Like USER_SETTABLE_SHOULD_QUIT but for SHOULD_DUMP_CORE. */
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bool user_settable_should_dump_core;
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/* Like SHOULD_QUIT, but whether GDB should dump core. */
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const char *should_dump_core;
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/* Like USER_SETTABLE_SHOULD_QUIT but for SHOULD_PRINT_BACKTRACE. */
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bool user_settable_should_print_backtrace;
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/* When this is true GDB will print a backtrace when a problem of this
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type is encountered. */
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bool should_print_backtrace;
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};
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/* Report a problem, internal to GDB, to the user. Once the problem
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has been reported, and assuming GDB didn't quit, the caller can
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either allow execution to resume or throw an error. */
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static void ATTRIBUTE_PRINTF (4, 0)
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internal_vproblem (struct internal_problem *problem,
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const char *file, int line, const char *fmt, va_list ap)
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{
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static int dejavu;
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int quit_p;
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int dump_core_p;
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std::string reason;
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/* Don't allow infinite error/warning recursion. */
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{
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static const char msg[] = "Recursive internal problem.\n";
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switch (dejavu)
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{
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case 0:
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dejavu = 1;
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break;
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case 1:
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dejavu = 2;
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abort_with_message (msg);
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default:
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dejavu = 3;
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/* Newer GLIBC versions put the warn_unused_result attribute
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on write, but this is one of those rare cases where
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ignoring the return value is correct. Casting to (void)
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does not fix this problem. This is the solution suggested
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at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25509. */
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if (write (STDERR_FILENO, msg, sizeof (msg)) != sizeof (msg))
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abort (); /* ARI: abort */
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exit (1);
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}
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}
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/* Create a string containing the full error/warning message. Need
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to call query with this full string, as otherwize the reason
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(error/warning) and question become separated. Format using a
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style similar to a compiler error message. Include extra detail
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so that the user knows that they are living on the edge. */
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{
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std::string msg = string_vprintf (fmt, ap);
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reason = string_printf ("%s:%d: %s: %s\n"
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"A problem internal to GDB has been detected,\n"
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"further debugging may prove unreliable.",
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file, line, problem->name, msg.c_str ());
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}
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/* Fall back to abort_with_message if gdb_stderr is not set up. */
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if (current_ui == NULL)
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{
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fputs (reason.c_str (), stderr);
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abort_with_message ("\n");
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}
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/* Try to get the message out and at the start of a new line. */
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gdb::optional<target_terminal::scoped_restore_terminal_state> term_state;
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if (target_supports_terminal_ours ())
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{
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term_state.emplace ();
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target_terminal::ours_for_output ();
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}
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if (filtered_printing_initialized ())
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begin_line ();
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/* Emit the message unless query will emit it below. */
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if (problem->should_quit != internal_problem_ask
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|| !confirm
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|| !filtered_printing_initialized ()
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|| problem->should_print_backtrace)
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fprintf_unfiltered (gdb_stderr, "%s\n", reason.c_str ());
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if (problem->should_print_backtrace)
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gdb_internal_backtrace ();
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if (problem->should_quit == internal_problem_ask)
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{
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/* Default (yes/batch case) is to quit GDB. When in batch mode
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this lessens the likelihood of GDB going into an infinite
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loop. */
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if (!confirm || !filtered_printing_initialized ())
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quit_p = 1;
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else
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quit_p = query (_("%s\nQuit this debugging session? "),
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reason.c_str ());
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}
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else if (problem->should_quit == internal_problem_yes)
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quit_p = 1;
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else if (problem->should_quit == internal_problem_no)
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quit_p = 0;
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else
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internal_error (__FILE__, __LINE__, _("bad switch"));
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fputs_unfiltered (_("\nThis is a bug, please report it."), gdb_stderr);
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if (REPORT_BUGS_TO[0])
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fprintf_unfiltered (gdb_stderr, _(" For instructions, see:\n%s."),
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REPORT_BUGS_TO);
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fputs_unfiltered ("\n\n", gdb_stderr);
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if (problem->should_dump_core == internal_problem_ask)
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{
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if (!can_dump_core_warn (LIMIT_MAX, reason.c_str ()))
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dump_core_p = 0;
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else if (!filtered_printing_initialized ())
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dump_core_p = 1;
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else
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{
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||
/* Default (yes/batch case) is to dump core. This leaves a GDB
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||
`dropping' so that it is easier to see that something went
|
||
wrong in GDB. */
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dump_core_p = query (_("%s\nCreate a core file of GDB? "),
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reason.c_str ());
|
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}
|
||
}
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||
else if (problem->should_dump_core == internal_problem_yes)
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||
dump_core_p = can_dump_core_warn (LIMIT_MAX, reason.c_str ());
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else if (problem->should_dump_core == internal_problem_no)
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||
dump_core_p = 0;
|
||
else
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internal_error (__FILE__, __LINE__, _("bad switch"));
|
||
|
||
if (quit_p)
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||
{
|
||
if (dump_core_p)
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||
dump_core ();
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||
else
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||
exit (1);
|
||
}
|
||
else
|
||
{
|
||
if (dump_core_p)
|
||
{
|
||
#ifdef HAVE_WORKING_FORK
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||
if (fork () == 0)
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||
dump_core ();
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||
#endif
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||
}
|
||
}
|
||
|
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dejavu = 0;
|
||
}
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||
|
||
static struct internal_problem internal_error_problem = {
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||
"internal-error", true, internal_problem_ask, true, internal_problem_ask,
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||
true, GDB_PRINT_INTERNAL_BACKTRACE_INIT_ON
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||
};
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||
|
||
void
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||
internal_verror (const char *file, int line, const char *fmt, va_list ap)
|
||
{
|
||
internal_vproblem (&internal_error_problem, file, line, fmt, ap);
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||
throw_quit (_("Command aborted."));
|
||
}
|
||
|
||
static struct internal_problem internal_warning_problem = {
|
||
"internal-warning", true, internal_problem_ask, true, internal_problem_ask,
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||
true, false
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||
};
|
||
|
||
void
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||
internal_vwarning (const char *file, int line, const char *fmt, va_list ap)
|
||
{
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||
internal_vproblem (&internal_warning_problem, file, line, fmt, ap);
|
||
}
|
||
|
||
static struct internal_problem demangler_warning_problem = {
|
||
"demangler-warning", true, internal_problem_ask, false, internal_problem_no,
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||
false, false
|
||
};
|
||
|
||
void
|
||
demangler_vwarning (const char *file, int line, const char *fmt, va_list ap)
|
||
{
|
||
internal_vproblem (&demangler_warning_problem, file, line, fmt, ap);
|
||
}
|
||
|
||
void
|
||
demangler_warning (const char *file, int line, const char *string, ...)
|
||
{
|
||
va_list ap;
|
||
|
||
va_start (ap, string);
|
||
demangler_vwarning (file, line, string, ap);
|
||
va_end (ap);
|
||
}
|
||
|
||
/* When GDB reports an internal problem (error or warning) it gives
|
||
the user the opportunity to quit GDB and/or create a core file of
|
||
the current debug session. This function registers a few commands
|
||
that make it possible to specify that GDB should always or never
|
||
quit or create a core file, without asking. The commands look
|
||
like:
|
||
|
||
maint set PROBLEM-NAME quit ask|yes|no
|
||
maint show PROBLEM-NAME quit
|
||
maint set PROBLEM-NAME corefile ask|yes|no
|
||
maint show PROBLEM-NAME corefile
|
||
|
||
Where PROBLEM-NAME is currently "internal-error" or
|
||
"internal-warning". */
|
||
|
||
static void
|
||
add_internal_problem_command (struct internal_problem *problem)
|
||
{
|
||
struct cmd_list_element **set_cmd_list;
|
||
struct cmd_list_element **show_cmd_list;
|
||
|
||
set_cmd_list = XNEW (struct cmd_list_element *);
|
||
show_cmd_list = XNEW (struct cmd_list_element *);
|
||
*set_cmd_list = NULL;
|
||
*show_cmd_list = NULL;
|
||
|
||
/* The add_basic_prefix_cmd and add_show_prefix_cmd functions take
|
||
ownership of the string passed in, which is why we don't need to free
|
||
set_doc and show_doc in this function. */
|
||
const char *set_doc
|
||
= xstrprintf (_("Configure what GDB does when %s is detected."),
|
||
problem->name).release ();
|
||
const char *show_doc
|
||
= xstrprintf (_("Show what GDB does when %s is detected."),
|
||
problem->name).release ();
|
||
|
||
add_setshow_prefix_cmd (problem->name, class_maintenance,
|
||
set_doc, show_doc, set_cmd_list, show_cmd_list,
|
||
&maintenance_set_cmdlist, &maintenance_show_cmdlist);
|
||
|
||
if (problem->user_settable_should_quit)
|
||
{
|
||
std::string set_quit_doc
|
||
= string_printf (_("Set whether GDB should quit when an %s is "
|
||
"detected."), problem->name);
|
||
std::string show_quit_doc
|
||
= string_printf (_("Show whether GDB will quit when an %s is "
|
||
"detected."), problem->name);
|
||
add_setshow_enum_cmd ("quit", class_maintenance,
|
||
internal_problem_modes,
|
||
&problem->should_quit,
|
||
set_quit_doc.c_str (),
|
||
show_quit_doc.c_str (),
|
||
NULL, /* help_doc */
|
||
NULL, /* setfunc */
|
||
NULL, /* showfunc */
|
||
set_cmd_list,
|
||
show_cmd_list);
|
||
}
|
||
|
||
if (problem->user_settable_should_dump_core)
|
||
{
|
||
std::string set_core_doc
|
||
= string_printf (_("Set whether GDB should create a core file of "
|
||
"GDB when %s is detected."), problem->name);
|
||
std::string show_core_doc
|
||
= string_printf (_("Show whether GDB will create a core file of "
|
||
"GDB when %s is detected."), problem->name);
|
||
add_setshow_enum_cmd ("corefile", class_maintenance,
|
||
internal_problem_modes,
|
||
&problem->should_dump_core,
|
||
set_core_doc.c_str (),
|
||
show_core_doc.c_str (),
|
||
NULL, /* help_doc */
|
||
NULL, /* setfunc */
|
||
NULL, /* showfunc */
|
||
set_cmd_list,
|
||
show_cmd_list);
|
||
}
|
||
|
||
if (problem->user_settable_should_print_backtrace)
|
||
{
|
||
std::string set_bt_doc
|
||
= string_printf (_("Set whether GDB should print a backtrace of "
|
||
"GDB when %s is detected."), problem->name);
|
||
std::string show_bt_doc
|
||
= string_printf (_("Show whether GDB will print a backtrace of "
|
||
"GDB when %s is detected."), problem->name);
|
||
add_setshow_boolean_cmd ("backtrace", class_maintenance,
|
||
&problem->should_print_backtrace,
|
||
set_bt_doc.c_str (),
|
||
show_bt_doc.c_str (),
|
||
NULL, /* help_doc */
|
||
gdb_internal_backtrace_set_cmd,
|
||
NULL, /* showfunc */
|
||
set_cmd_list,
|
||
show_cmd_list);
|
||
}
|
||
}
|
||
|
||
/* Return a newly allocated string, containing the PREFIX followed
|
||
by the system error message for errno (separated by a colon). */
|
||
|
||
static std::string
|
||
perror_string (const char *prefix)
|
||
{
|
||
const char *err = safe_strerror (errno);
|
||
return std::string (prefix) + ": " + err;
|
||
}
|
||
|
||
/* Print the system error message for errno, and also mention STRING
|
||
as the file name for which the error was encountered. Use ERRCODE
|
||
for the thrown exception. Then return to command level. */
|
||
|
||
void
|
||
throw_perror_with_name (enum errors errcode, const char *string)
|
||
{
|
||
std::string combined = perror_string (string);
|
||
|
||
/* I understand setting these is a matter of taste. Still, some people
|
||
may clear errno but not know about bfd_error. Doing this here is not
|
||
unreasonable. */
|
||
bfd_set_error (bfd_error_no_error);
|
||
errno = 0;
|
||
|
||
throw_error (errcode, _("%s."), combined.c_str ());
|
||
}
|
||
|
||
/* See throw_perror_with_name, ERRCODE defaults here to GENERIC_ERROR. */
|
||
|
||
void
|
||
perror_with_name (const char *string)
|
||
{
|
||
throw_perror_with_name (GENERIC_ERROR, string);
|
||
}
|
||
|
||
/* Same as perror_with_name except that it prints a warning instead
|
||
of throwing an error. */
|
||
|
||
void
|
||
perror_warning_with_name (const char *string)
|
||
{
|
||
std::string combined = perror_string (string);
|
||
warning (_("%s"), combined.c_str ());
|
||
}
|
||
|
||
/* Print the system error message for ERRCODE, and also mention STRING
|
||
as the file name for which the error was encountered. */
|
||
|
||
void
|
||
print_sys_errmsg (const char *string, int errcode)
|
||
{
|
||
const char *err = safe_strerror (errcode);
|
||
/* We want anything which was printed on stdout to come out first, before
|
||
this message. */
|
||
gdb_flush (gdb_stdout);
|
||
fprintf_unfiltered (gdb_stderr, "%s: %s.\n", string, err);
|
||
}
|
||
|
||
/* Control C eventually causes this to be called, at a convenient time. */
|
||
|
||
void
|
||
quit (void)
|
||
{
|
||
if (sync_quit_force_run)
|
||
{
|
||
sync_quit_force_run = 0;
|
||
quit_force (NULL, 0);
|
||
}
|
||
|
||
#ifdef __MSDOS__
|
||
/* No steenking SIGINT will ever be coming our way when the
|
||
program is resumed. Don't lie. */
|
||
throw_quit ("Quit");
|
||
#else
|
||
if (job_control
|
||
/* If there is no terminal switching for this target, then we can't
|
||
possibly get screwed by the lack of job control. */
|
||
|| !target_supports_terminal_ours ())
|
||
throw_quit ("Quit");
|
||
else
|
||
throw_quit ("Quit (expect signal SIGINT when the program is resumed)");
|
||
#endif
|
||
}
|
||
|
||
/* See defs.h. */
|
||
|
||
void
|
||
maybe_quit (void)
|
||
{
|
||
if (sync_quit_force_run)
|
||
quit ();
|
||
|
||
quit_handler ();
|
||
}
|
||
|
||
|
||
/* Called when a memory allocation fails, with the number of bytes of
|
||
memory requested in SIZE. */
|
||
|
||
void
|
||
malloc_failure (long size)
|
||
{
|
||
if (size > 0)
|
||
{
|
||
internal_error (__FILE__, __LINE__,
|
||
_("virtual memory exhausted: can't allocate %ld bytes."),
|
||
size);
|
||
}
|
||
else
|
||
{
|
||
internal_error (__FILE__, __LINE__, _("virtual memory exhausted."));
|
||
}
|
||
}
|
||
|
||
/* See common/errors.h. */
|
||
|
||
void
|
||
flush_streams ()
|
||
{
|
||
gdb_stdout->flush ();
|
||
gdb_stderr->flush ();
|
||
}
|
||
|
||
/* My replacement for the read system call.
|
||
Used like `read' but keeps going if `read' returns too soon. */
|
||
|
||
int
|
||
myread (int desc, char *addr, int len)
|
||
{
|
||
int val;
|
||
int orglen = len;
|
||
|
||
while (len > 0)
|
||
{
|
||
val = read (desc, addr, len);
|
||
if (val < 0)
|
||
return val;
|
||
if (val == 0)
|
||
return orglen - len;
|
||
len -= val;
|
||
addr += val;
|
||
}
|
||
return orglen;
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
ULONGEST
|
||
uinteger_pow (ULONGEST v1, LONGEST v2)
|
||
{
|
||
if (v2 < 0)
|
||
{
|
||
if (v1 == 0)
|
||
error (_("Attempt to raise 0 to negative power."));
|
||
else
|
||
return 0;
|
||
}
|
||
else
|
||
{
|
||
/* The Russian Peasant's Algorithm. */
|
||
ULONGEST v;
|
||
|
||
v = 1;
|
||
for (;;)
|
||
{
|
||
if (v2 & 1L)
|
||
v *= v1;
|
||
v2 >>= 1;
|
||
if (v2 == 0)
|
||
return v;
|
||
v1 *= v1;
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* An RAII class that sets up to handle input and then tears down
|
||
during destruction. */
|
||
|
||
class scoped_input_handler
|
||
{
|
||
public:
|
||
|
||
scoped_input_handler ()
|
||
: m_quit_handler (&quit_handler, default_quit_handler),
|
||
m_ui (NULL)
|
||
{
|
||
target_terminal::ours ();
|
||
ui_register_input_event_handler (current_ui);
|
||
if (current_ui->prompt_state == PROMPT_BLOCKED)
|
||
m_ui = current_ui;
|
||
}
|
||
|
||
~scoped_input_handler ()
|
||
{
|
||
if (m_ui != NULL)
|
||
ui_unregister_input_event_handler (m_ui);
|
||
}
|
||
|
||
DISABLE_COPY_AND_ASSIGN (scoped_input_handler);
|
||
|
||
private:
|
||
|
||
/* Save and restore the terminal state. */
|
||
target_terminal::scoped_restore_terminal_state m_term_state;
|
||
|
||
/* Save and restore the quit handler. */
|
||
scoped_restore_tmpl<quit_handler_ftype *> m_quit_handler;
|
||
|
||
/* The saved UI, if non-NULL. */
|
||
struct ui *m_ui;
|
||
};
|
||
|
||
|
||
|
||
/* This function supports the query, nquery, and yquery functions.
|
||
Ask user a y-or-n question and return 0 if answer is no, 1 if
|
||
answer is yes, or default the answer to the specified default
|
||
(for yquery or nquery). DEFCHAR may be 'y' or 'n' to provide a
|
||
default answer, or '\0' for no default.
|
||
CTLSTR is the control string and should end in "? ". It should
|
||
not say how to answer, because we do that.
|
||
ARGS are the arguments passed along with the CTLSTR argument to
|
||
printf. */
|
||
|
||
static int ATTRIBUTE_PRINTF (1, 0)
|
||
defaulted_query (const char *ctlstr, const char defchar, va_list args)
|
||
{
|
||
int retval;
|
||
int def_value;
|
||
char def_answer, not_def_answer;
|
||
const char *y_string, *n_string;
|
||
|
||
/* Set up according to which answer is the default. */
|
||
if (defchar == '\0')
|
||
{
|
||
def_value = 1;
|
||
def_answer = 'Y';
|
||
not_def_answer = 'N';
|
||
y_string = "y";
|
||
n_string = "n";
|
||
}
|
||
else if (defchar == 'y')
|
||
{
|
||
def_value = 1;
|
||
def_answer = 'Y';
|
||
not_def_answer = 'N';
|
||
y_string = "[y]";
|
||
n_string = "n";
|
||
}
|
||
else
|
||
{
|
||
def_value = 0;
|
||
def_answer = 'N';
|
||
not_def_answer = 'Y';
|
||
y_string = "y";
|
||
n_string = "[n]";
|
||
}
|
||
|
||
/* Automatically answer the default value if the user did not want
|
||
prompts or the command was issued with the server prefix. */
|
||
if (!confirm || server_command)
|
||
return def_value;
|
||
|
||
/* If input isn't coming from the user directly, just say what
|
||
question we're asking, and then answer the default automatically. This
|
||
way, important error messages don't get lost when talking to GDB
|
||
over a pipe. */
|
||
if (current_ui->instream != current_ui->stdin_stream
|
||
|| !input_interactive_p (current_ui)
|
||
/* Restrict queries to the main UI. */
|
||
|| current_ui != main_ui)
|
||
{
|
||
target_terminal::scoped_restore_terminal_state term_state;
|
||
target_terminal::ours_for_output ();
|
||
wrap_here ("");
|
||
vfprintf_filtered (gdb_stdout, ctlstr, args);
|
||
|
||
printf_filtered (_("(%s or %s) [answered %c; "
|
||
"input not from terminal]\n"),
|
||
y_string, n_string, def_answer);
|
||
|
||
return def_value;
|
||
}
|
||
|
||
if (deprecated_query_hook)
|
||
{
|
||
target_terminal::scoped_restore_terminal_state term_state;
|
||
return deprecated_query_hook (ctlstr, args);
|
||
}
|
||
|
||
/* Format the question outside of the loop, to avoid reusing args. */
|
||
std::string question = string_vprintf (ctlstr, args);
|
||
std::string prompt
|
||
= string_printf (_("%s%s(%s or %s) %s"),
|
||
annotation_level > 1 ? "\n\032\032pre-query\n" : "",
|
||
question.c_str (), y_string, n_string,
|
||
annotation_level > 1 ? "\n\032\032query\n" : "");
|
||
|
||
/* Used to add duration we waited for user to respond to
|
||
prompt_for_continue_wait_time. */
|
||
using namespace std::chrono;
|
||
steady_clock::time_point prompt_started = steady_clock::now ();
|
||
|
||
scoped_input_handler prepare_input;
|
||
|
||
while (1)
|
||
{
|
||
char *response, answer;
|
||
|
||
gdb_flush (gdb_stdout);
|
||
response = gdb_readline_wrapper (prompt.c_str ());
|
||
|
||
if (response == NULL) /* C-d */
|
||
{
|
||
printf_filtered ("EOF [assumed %c]\n", def_answer);
|
||
retval = def_value;
|
||
break;
|
||
}
|
||
|
||
answer = response[0];
|
||
xfree (response);
|
||
|
||
if (answer >= 'a')
|
||
answer -= 040;
|
||
/* Check answer. For the non-default, the user must specify
|
||
the non-default explicitly. */
|
||
if (answer == not_def_answer)
|
||
{
|
||
retval = !def_value;
|
||
break;
|
||
}
|
||
/* Otherwise, if a default was specified, the user may either
|
||
specify the required input or have it default by entering
|
||
nothing. */
|
||
if (answer == def_answer
|
||
|| (defchar != '\0' && answer == '\0'))
|
||
{
|
||
retval = def_value;
|
||
break;
|
||
}
|
||
/* Invalid entries are not defaulted and require another selection. */
|
||
printf_filtered (_("Please answer %s or %s.\n"),
|
||
y_string, n_string);
|
||
}
|
||
|
||
/* Add time spend in this routine to prompt_for_continue_wait_time. */
|
||
prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
|
||
|
||
if (annotation_level > 1)
|
||
printf_filtered (("\n\032\032post-query\n"));
|
||
return retval;
|
||
}
|
||
|
||
|
||
/* Ask user a y-or-n question and return 0 if answer is no, 1 if
|
||
answer is yes, or 0 if answer is defaulted.
|
||
Takes three args which are given to printf to print the question.
|
||
The first, a control string, should end in "? ".
|
||
It should not say how to answer, because we do that. */
|
||
|
||
int
|
||
nquery (const char *ctlstr, ...)
|
||
{
|
||
va_list args;
|
||
int ret;
|
||
|
||
va_start (args, ctlstr);
|
||
ret = defaulted_query (ctlstr, 'n', args);
|
||
va_end (args);
|
||
return ret;
|
||
}
|
||
|
||
/* Ask user a y-or-n question and return 0 if answer is no, 1 if
|
||
answer is yes, or 1 if answer is defaulted.
|
||
Takes three args which are given to printf to print the question.
|
||
The first, a control string, should end in "? ".
|
||
It should not say how to answer, because we do that. */
|
||
|
||
int
|
||
yquery (const char *ctlstr, ...)
|
||
{
|
||
va_list args;
|
||
int ret;
|
||
|
||
va_start (args, ctlstr);
|
||
ret = defaulted_query (ctlstr, 'y', args);
|
||
va_end (args);
|
||
return ret;
|
||
}
|
||
|
||
/* Ask user a y-or-n question and return 1 iff answer is yes.
|
||
Takes three args which are given to printf to print the question.
|
||
The first, a control string, should end in "? ".
|
||
It should not say how to answer, because we do that. */
|
||
|
||
int
|
||
query (const char *ctlstr, ...)
|
||
{
|
||
va_list args;
|
||
int ret;
|
||
|
||
va_start (args, ctlstr);
|
||
ret = defaulted_query (ctlstr, '\0', args);
|
||
va_end (args);
|
||
return ret;
|
||
}
|
||
|
||
/* A helper for parse_escape that converts a host character to a
|
||
target character. C is the host character. If conversion is
|
||
possible, then the target character is stored in *TARGET_C and the
|
||
function returns 1. Otherwise, the function returns 0. */
|
||
|
||
static int
|
||
host_char_to_target (struct gdbarch *gdbarch, int c, int *target_c)
|
||
{
|
||
char the_char = c;
|
||
int result = 0;
|
||
|
||
auto_obstack host_data;
|
||
|
||
convert_between_encodings (target_charset (gdbarch), host_charset (),
|
||
(gdb_byte *) &the_char, 1, 1,
|
||
&host_data, translit_none);
|
||
|
||
if (obstack_object_size (&host_data) == 1)
|
||
{
|
||
result = 1;
|
||
*target_c = *(char *) obstack_base (&host_data);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Parse a C escape sequence. STRING_PTR points to a variable
|
||
containing a pointer to the string to parse. That pointer
|
||
should point to the character after the \. That pointer
|
||
is updated past the characters we use. The value of the
|
||
escape sequence is returned.
|
||
|
||
A negative value means the sequence \ newline was seen,
|
||
which is supposed to be equivalent to nothing at all.
|
||
|
||
If \ is followed by a null character, we return a negative
|
||
value and leave the string pointer pointing at the null character.
|
||
|
||
If \ is followed by 000, we return 0 and leave the string pointer
|
||
after the zeros. A value of 0 does not mean end of string. */
|
||
|
||
int
|
||
parse_escape (struct gdbarch *gdbarch, const char **string_ptr)
|
||
{
|
||
int target_char = -2; /* Initialize to avoid GCC warnings. */
|
||
int c = *(*string_ptr)++;
|
||
|
||
switch (c)
|
||
{
|
||
case '\n':
|
||
return -2;
|
||
case 0:
|
||
(*string_ptr)--;
|
||
return 0;
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
{
|
||
int i = host_hex_value (c);
|
||
int count = 0;
|
||
while (++count < 3)
|
||
{
|
||
c = (**string_ptr);
|
||
if (ISDIGIT (c) && c != '8' && c != '9')
|
||
{
|
||
(*string_ptr)++;
|
||
i *= 8;
|
||
i += host_hex_value (c);
|
||
}
|
||
else
|
||
{
|
||
break;
|
||
}
|
||
}
|
||
return i;
|
||
}
|
||
|
||
case 'a':
|
||
c = '\a';
|
||
break;
|
||
case 'b':
|
||
c = '\b';
|
||
break;
|
||
case 'f':
|
||
c = '\f';
|
||
break;
|
||
case 'n':
|
||
c = '\n';
|
||
break;
|
||
case 'r':
|
||
c = '\r';
|
||
break;
|
||
case 't':
|
||
c = '\t';
|
||
break;
|
||
case 'v':
|
||
c = '\v';
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (!host_char_to_target (gdbarch, c, &target_char))
|
||
error (_("The escape sequence `\\%c' is equivalent to plain `%c',"
|
||
" which has no equivalent\nin the `%s' character set."),
|
||
c, c, target_charset (gdbarch));
|
||
return target_char;
|
||
}
|
||
|
||
/* Print the character C on STREAM as part of the contents of a literal
|
||
string whose delimiter is QUOTER. Note that this routine should only
|
||
be called for printing things which are independent of the language
|
||
of the program being debugged.
|
||
|
||
printchar will normally escape backslashes and instances of QUOTER. If
|
||
QUOTER is 0, printchar won't escape backslashes or any quoting character.
|
||
As a side effect, if you pass the backslash character as the QUOTER,
|
||
printchar will escape backslashes as usual, but not any other quoting
|
||
character. */
|
||
|
||
static void
|
||
printchar (int c, do_fputc_ftype do_fputc, ui_file *stream, int quoter)
|
||
{
|
||
c &= 0xFF; /* Avoid sign bit follies */
|
||
|
||
if (c < 0x20 || /* Low control chars */
|
||
(c >= 0x7F && c < 0xA0) || /* DEL, High controls */
|
||
(sevenbit_strings && c >= 0x80))
|
||
{ /* high order bit set */
|
||
do_fputc ('\\', stream);
|
||
|
||
switch (c)
|
||
{
|
||
case '\n':
|
||
do_fputc ('n', stream);
|
||
break;
|
||
case '\b':
|
||
do_fputc ('b', stream);
|
||
break;
|
||
case '\t':
|
||
do_fputc ('t', stream);
|
||
break;
|
||
case '\f':
|
||
do_fputc ('f', stream);
|
||
break;
|
||
case '\r':
|
||
do_fputc ('r', stream);
|
||
break;
|
||
case '\033':
|
||
do_fputc ('e', stream);
|
||
break;
|
||
case '\007':
|
||
do_fputc ('a', stream);
|
||
break;
|
||
default:
|
||
{
|
||
do_fputc ('0' + ((c >> 6) & 0x7), stream);
|
||
do_fputc ('0' + ((c >> 3) & 0x7), stream);
|
||
do_fputc ('0' + ((c >> 0) & 0x7), stream);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (quoter != 0 && (c == '\\' || c == quoter))
|
||
do_fputc ('\\', stream);
|
||
do_fputc (c, stream);
|
||
}
|
||
}
|
||
|
||
/* Print the character C on STREAM as part of the contents of a
|
||
literal string whose delimiter is QUOTER. Note that these routines
|
||
should only be call for printing things which are independent of
|
||
the language of the program being debugged. */
|
||
|
||
void
|
||
fputstr_filtered (const char *str, int quoter, struct ui_file *stream)
|
||
{
|
||
while (*str)
|
||
printchar (*str++, fputc_filtered, stream, quoter);
|
||
}
|
||
|
||
void
|
||
fputstr_unfiltered (const char *str, int quoter, struct ui_file *stream)
|
||
{
|
||
while (*str)
|
||
printchar (*str++, fputc_unfiltered, stream, quoter);
|
||
}
|
||
|
||
void
|
||
fputstrn_filtered (const char *str, int n, int quoter,
|
||
struct ui_file *stream)
|
||
{
|
||
for (int i = 0; i < n; i++)
|
||
printchar (str[i], fputc_filtered, stream, quoter);
|
||
}
|
||
|
||
void
|
||
fputstrn_unfiltered (const char *str, int n, int quoter,
|
||
do_fputc_ftype do_fputc, struct ui_file *stream)
|
||
{
|
||
for (int i = 0; i < n; i++)
|
||
printchar (str[i], do_fputc, stream, quoter);
|
||
}
|
||
|
||
|
||
/* Number of lines per page or UINT_MAX if paging is disabled. */
|
||
static unsigned int lines_per_page;
|
||
static void
|
||
show_lines_per_page (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file,
|
||
_("Number of lines gdb thinks are in a page is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
/* Number of chars per line or UINT_MAX if line folding is disabled. */
|
||
static unsigned int chars_per_line;
|
||
static void
|
||
show_chars_per_line (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file,
|
||
_("Number of characters gdb thinks "
|
||
"are in a line is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
/* Current count of lines printed on this page, chars on this line. */
|
||
static unsigned int lines_printed, chars_printed;
|
||
|
||
/* True if pagination is disabled for just one command. */
|
||
|
||
static bool pagination_disabled_for_command;
|
||
|
||
/* Buffer and start column of buffered text, for doing smarter word-
|
||
wrapping. When someone calls wrap_here(), we start buffering output
|
||
that comes through fputs_filtered(). If we see a newline, we just
|
||
spit it out and forget about the wrap_here(). If we see another
|
||
wrap_here(), we spit it out and remember the newer one. If we see
|
||
the end of the line, we spit out a newline, the indent, and then
|
||
the buffered output. */
|
||
|
||
static bool filter_initialized = false;
|
||
|
||
/* Contains characters which are waiting to be output (they have
|
||
already been counted in chars_printed). */
|
||
static std::string wrap_buffer;
|
||
|
||
/* String to indent by if the wrap occurs. Must not be NULL if wrap_column
|
||
is non-zero. */
|
||
static const char *wrap_indent;
|
||
|
||
/* Column number on the screen where wrap_buffer begins, or 0 if wrapping
|
||
is not in effect. */
|
||
static int wrap_column;
|
||
|
||
/* The style applied at the time that wrap_here was called. */
|
||
static ui_file_style wrap_style;
|
||
|
||
|
||
/* Initialize the number of lines per page and chars per line. */
|
||
|
||
void
|
||
init_page_info (void)
|
||
{
|
||
if (batch_flag)
|
||
{
|
||
lines_per_page = UINT_MAX;
|
||
chars_per_line = UINT_MAX;
|
||
}
|
||
else
|
||
#if defined(TUI)
|
||
if (!tui_get_command_dimension (&chars_per_line, &lines_per_page))
|
||
#endif
|
||
{
|
||
int rows, cols;
|
||
|
||
#if defined(__GO32__)
|
||
rows = ScreenRows ();
|
||
cols = ScreenCols ();
|
||
lines_per_page = rows;
|
||
chars_per_line = cols;
|
||
#else
|
||
/* Make sure Readline has initialized its terminal settings. */
|
||
rl_reset_terminal (NULL);
|
||
|
||
/* Get the screen size from Readline. */
|
||
rl_get_screen_size (&rows, &cols);
|
||
lines_per_page = rows;
|
||
chars_per_line = cols;
|
||
|
||
/* Readline should have fetched the termcap entry for us.
|
||
Only try to use tgetnum function if rl_get_screen_size
|
||
did not return a useful value. */
|
||
if (((rows <= 0) && (tgetnum ((char *) "li") < 0))
|
||
/* Also disable paging if inside Emacs. $EMACS was used
|
||
before Emacs v25.1, $INSIDE_EMACS is used since then. */
|
||
|| getenv ("EMACS") || getenv ("INSIDE_EMACS"))
|
||
{
|
||
/* The number of lines per page is not mentioned in the terminal
|
||
description or EMACS environment variable is set. This probably
|
||
means that paging is not useful, so disable paging. */
|
||
lines_per_page = UINT_MAX;
|
||
}
|
||
|
||
/* If the output is not a terminal, don't paginate it. */
|
||
if (!gdb_stdout->isatty ())
|
||
lines_per_page = UINT_MAX;
|
||
#endif
|
||
}
|
||
|
||
/* We handle SIGWINCH ourselves. */
|
||
rl_catch_sigwinch = 0;
|
||
|
||
set_screen_size ();
|
||
set_width ();
|
||
}
|
||
|
||
/* Return nonzero if filtered printing is initialized. */
|
||
int
|
||
filtered_printing_initialized (void)
|
||
{
|
||
return filter_initialized;
|
||
}
|
||
|
||
set_batch_flag_and_restore_page_info::set_batch_flag_and_restore_page_info ()
|
||
: m_save_lines_per_page (lines_per_page),
|
||
m_save_chars_per_line (chars_per_line),
|
||
m_save_batch_flag (batch_flag)
|
||
{
|
||
batch_flag = 1;
|
||
init_page_info ();
|
||
}
|
||
|
||
set_batch_flag_and_restore_page_info::~set_batch_flag_and_restore_page_info ()
|
||
{
|
||
batch_flag = m_save_batch_flag;
|
||
chars_per_line = m_save_chars_per_line;
|
||
lines_per_page = m_save_lines_per_page;
|
||
|
||
set_screen_size ();
|
||
set_width ();
|
||
}
|
||
|
||
/* Set the screen size based on LINES_PER_PAGE and CHARS_PER_LINE. */
|
||
|
||
static void
|
||
set_screen_size (void)
|
||
{
|
||
int rows = lines_per_page;
|
||
int cols = chars_per_line;
|
||
|
||
/* If we get 0 or negative ROWS or COLS, treat as "infinite" size.
|
||
A negative number can be seen here with the "set width/height"
|
||
commands and either:
|
||
|
||
- the user specified "unlimited", which maps to UINT_MAX, or
|
||
- the user specified some number between INT_MAX and UINT_MAX.
|
||
|
||
Cap "infinity" to approximately sqrt(INT_MAX) so that we don't
|
||
overflow in rl_set_screen_size, which multiplies rows and columns
|
||
to compute the number of characters on the screen. */
|
||
|
||
const int sqrt_int_max = INT_MAX >> (sizeof (int) * 8 / 2);
|
||
|
||
if (rows <= 0 || rows > sqrt_int_max)
|
||
{
|
||
rows = sqrt_int_max;
|
||
lines_per_page = UINT_MAX;
|
||
}
|
||
|
||
if (cols <= 0 || cols > sqrt_int_max)
|
||
{
|
||
cols = sqrt_int_max;
|
||
chars_per_line = UINT_MAX;
|
||
}
|
||
|
||
/* Update Readline's idea of the terminal size. */
|
||
rl_set_screen_size (rows, cols);
|
||
}
|
||
|
||
/* Reinitialize WRAP_BUFFER. */
|
||
|
||
static void
|
||
set_width (void)
|
||
{
|
||
if (chars_per_line == 0)
|
||
init_page_info ();
|
||
|
||
wrap_buffer.clear ();
|
||
filter_initialized = true;
|
||
}
|
||
|
||
static void
|
||
set_width_command (const char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
set_screen_size ();
|
||
set_width ();
|
||
}
|
||
|
||
static void
|
||
set_height_command (const char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
set_screen_size ();
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
set_screen_width_and_height (int width, int height)
|
||
{
|
||
lines_per_page = height;
|
||
chars_per_line = width;
|
||
|
||
set_screen_size ();
|
||
set_width ();
|
||
}
|
||
|
||
/* The currently applied style. */
|
||
|
||
static ui_file_style applied_style;
|
||
|
||
/* Emit an ANSI style escape for STYLE. If STREAM is nullptr, emit to
|
||
the wrap buffer; otherwise emit to STREAM. */
|
||
|
||
static void
|
||
emit_style_escape (const ui_file_style &style,
|
||
struct ui_file *stream = nullptr)
|
||
{
|
||
if (applied_style != style)
|
||
{
|
||
applied_style = style;
|
||
|
||
if (stream == nullptr)
|
||
wrap_buffer.append (style.to_ansi ());
|
||
else
|
||
stream->puts (style.to_ansi ().c_str ());
|
||
}
|
||
}
|
||
|
||
/* Set the current output style. This will affect future uses of the
|
||
_filtered output functions. */
|
||
|
||
static void
|
||
set_output_style (struct ui_file *stream, const ui_file_style &style)
|
||
{
|
||
if (!stream->can_emit_style_escape ())
|
||
return;
|
||
|
||
/* Note that we may not pass STREAM here, when we want to emit to
|
||
the wrap buffer, not directly to STREAM. */
|
||
if (stream == gdb_stdout)
|
||
stream = nullptr;
|
||
emit_style_escape (style, stream);
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
reset_terminal_style (struct ui_file *stream)
|
||
{
|
||
if (stream->can_emit_style_escape ())
|
||
{
|
||
/* Force the setting, regardless of what we think the setting
|
||
might already be. */
|
||
applied_style = ui_file_style ();
|
||
wrap_buffer.append (applied_style.to_ansi ());
|
||
}
|
||
}
|
||
|
||
/* Wait, so the user can read what's on the screen. Prompt the user
|
||
to continue by pressing RETURN. 'q' is also provided because
|
||
telling users what to do in the prompt is more user-friendly than
|
||
expecting them to think of Ctrl-C/SIGINT. */
|
||
|
||
static void
|
||
prompt_for_continue (void)
|
||
{
|
||
char cont_prompt[120];
|
||
/* Used to add duration we waited for user to respond to
|
||
prompt_for_continue_wait_time. */
|
||
using namespace std::chrono;
|
||
steady_clock::time_point prompt_started = steady_clock::now ();
|
||
bool disable_pagination = pagination_disabled_for_command;
|
||
|
||
/* Clear the current styling. */
|
||
if (gdb_stdout->can_emit_style_escape ())
|
||
emit_style_escape (ui_file_style (), gdb_stdout);
|
||
|
||
if (annotation_level > 1)
|
||
printf_unfiltered (("\n\032\032pre-prompt-for-continue\n"));
|
||
|
||
strcpy (cont_prompt,
|
||
"--Type <RET> for more, q to quit, "
|
||
"c to continue without paging--");
|
||
if (annotation_level > 1)
|
||
strcat (cont_prompt, "\n\032\032prompt-for-continue\n");
|
||
|
||
/* We must do this *before* we call gdb_readline_wrapper, else it
|
||
will eventually call us -- thinking that we're trying to print
|
||
beyond the end of the screen. */
|
||
reinitialize_more_filter ();
|
||
|
||
scoped_input_handler prepare_input;
|
||
|
||
/* Call gdb_readline_wrapper, not readline, in order to keep an
|
||
event loop running. */
|
||
gdb::unique_xmalloc_ptr<char> ignore (gdb_readline_wrapper (cont_prompt));
|
||
|
||
/* Add time spend in this routine to prompt_for_continue_wait_time. */
|
||
prompt_for_continue_wait_time += steady_clock::now () - prompt_started;
|
||
|
||
if (annotation_level > 1)
|
||
printf_unfiltered (("\n\032\032post-prompt-for-continue\n"));
|
||
|
||
if (ignore != NULL)
|
||
{
|
||
char *p = ignore.get ();
|
||
|
||
while (*p == ' ' || *p == '\t')
|
||
++p;
|
||
if (p[0] == 'q')
|
||
/* Do not call quit here; there is no possibility of SIGINT. */
|
||
throw_quit ("Quit");
|
||
if (p[0] == 'c')
|
||
disable_pagination = true;
|
||
}
|
||
|
||
/* Now we have to do this again, so that GDB will know that it doesn't
|
||
need to save the ---Type <return>--- line at the top of the screen. */
|
||
reinitialize_more_filter ();
|
||
pagination_disabled_for_command = disable_pagination;
|
||
|
||
dont_repeat (); /* Forget prev cmd -- CR won't repeat it. */
|
||
}
|
||
|
||
/* Initialize timer to keep track of how long we waited for the user. */
|
||
|
||
void
|
||
reset_prompt_for_continue_wait_time (void)
|
||
{
|
||
using namespace std::chrono;
|
||
|
||
prompt_for_continue_wait_time = steady_clock::duration::zero ();
|
||
}
|
||
|
||
/* Fetch the cumulative time spent in prompt_for_continue. */
|
||
|
||
std::chrono::steady_clock::duration
|
||
get_prompt_for_continue_wait_time ()
|
||
{
|
||
return prompt_for_continue_wait_time;
|
||
}
|
||
|
||
/* Reinitialize filter; ie. tell it to reset to original values. */
|
||
|
||
void
|
||
reinitialize_more_filter (void)
|
||
{
|
||
lines_printed = 0;
|
||
chars_printed = 0;
|
||
pagination_disabled_for_command = false;
|
||
}
|
||
|
||
/* Flush the wrap buffer to STREAM, if necessary. */
|
||
|
||
static void
|
||
flush_wrap_buffer (struct ui_file *stream)
|
||
{
|
||
if (stream == gdb_stdout && !wrap_buffer.empty ())
|
||
{
|
||
stream->puts (wrap_buffer.c_str ());
|
||
wrap_buffer.clear ();
|
||
}
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
gdb_flush (struct ui_file *stream)
|
||
{
|
||
flush_wrap_buffer (stream);
|
||
stream->flush ();
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
int
|
||
get_chars_per_line ()
|
||
{
|
||
return chars_per_line;
|
||
}
|
||
|
||
/* Indicate that if the next sequence of characters overflows the line,
|
||
a newline should be inserted here rather than when it hits the end.
|
||
If INDENT is non-null, it is a string to be printed to indent the
|
||
wrapped part on the next line. INDENT must remain accessible until
|
||
the next call to wrap_here() or until a newline is printed through
|
||
fputs_filtered().
|
||
|
||
If the line is already overfull, we immediately print a newline and
|
||
the indentation, and disable further wrapping.
|
||
|
||
If we don't know the width of lines, but we know the page height,
|
||
we must not wrap words, but should still keep track of newlines
|
||
that were explicitly printed.
|
||
|
||
INDENT should not contain tabs, as that will mess up the char count
|
||
on the next line. FIXME.
|
||
|
||
This routine is guaranteed to force out any output which has been
|
||
squirreled away in the wrap_buffer, so wrap_here ((char *)0) can be
|
||
used to force out output from the wrap_buffer. */
|
||
|
||
void
|
||
wrap_here (const char *indent)
|
||
{
|
||
/* This should have been allocated, but be paranoid anyway. */
|
||
gdb_assert (filter_initialized);
|
||
|
||
flush_wrap_buffer (gdb_stdout);
|
||
if (chars_per_line == UINT_MAX) /* No line overflow checking. */
|
||
{
|
||
wrap_column = 0;
|
||
}
|
||
else if (chars_printed >= chars_per_line)
|
||
{
|
||
puts_filtered ("\n");
|
||
if (indent != NULL)
|
||
puts_filtered (indent);
|
||
wrap_column = 0;
|
||
}
|
||
else
|
||
{
|
||
wrap_column = chars_printed;
|
||
if (indent == NULL)
|
||
wrap_indent = "";
|
||
else
|
||
wrap_indent = indent;
|
||
wrap_style = applied_style;
|
||
}
|
||
}
|
||
|
||
/* Print input string to gdb_stdout, filtered, with wrap,
|
||
arranging strings in columns of n chars. String can be
|
||
right or left justified in the column. Never prints
|
||
trailing spaces. String should never be longer than
|
||
width. FIXME: this could be useful for the EXAMINE
|
||
command, which currently doesn't tabulate very well. */
|
||
|
||
void
|
||
puts_filtered_tabular (char *string, int width, int right)
|
||
{
|
||
int spaces = 0;
|
||
int stringlen;
|
||
char *spacebuf;
|
||
|
||
gdb_assert (chars_per_line > 0);
|
||
if (chars_per_line == UINT_MAX)
|
||
{
|
||
fputs_filtered (string, gdb_stdout);
|
||
fputs_filtered ("\n", gdb_stdout);
|
||
return;
|
||
}
|
||
|
||
if (((chars_printed - 1) / width + 2) * width >= chars_per_line)
|
||
fputs_filtered ("\n", gdb_stdout);
|
||
|
||
if (width >= chars_per_line)
|
||
width = chars_per_line - 1;
|
||
|
||
stringlen = strlen (string);
|
||
|
||
if (chars_printed > 0)
|
||
spaces = width - (chars_printed - 1) % width - 1;
|
||
if (right)
|
||
spaces += width - stringlen;
|
||
|
||
spacebuf = (char *) alloca (spaces + 1);
|
||
spacebuf[spaces] = '\0';
|
||
while (spaces--)
|
||
spacebuf[spaces] = ' ';
|
||
|
||
fputs_filtered (spacebuf, gdb_stdout);
|
||
fputs_filtered (string, gdb_stdout);
|
||
}
|
||
|
||
|
||
/* Ensure that whatever gets printed next, using the filtered output
|
||
commands, starts at the beginning of the line. I.e. if there is
|
||
any pending output for the current line, flush it and start a new
|
||
line. Otherwise do nothing. */
|
||
|
||
void
|
||
begin_line (void)
|
||
{
|
||
if (chars_printed > 0)
|
||
{
|
||
puts_filtered ("\n");
|
||
}
|
||
}
|
||
|
||
|
||
/* Like fputs but if FILTER is true, pause after every screenful.
|
||
|
||
Regardless of FILTER can wrap at points other than the final
|
||
character of a line.
|
||
|
||
Unlike fputs, fputs_maybe_filtered does not return a value.
|
||
It is OK for LINEBUFFER to be NULL, in which case just don't print
|
||
anything.
|
||
|
||
Note that a longjmp to top level may occur in this routine (only if
|
||
FILTER is true) (since prompt_for_continue may do so) so this
|
||
routine should not be called when cleanups are not in place. */
|
||
|
||
static void
|
||
fputs_maybe_filtered (const char *linebuffer, struct ui_file *stream,
|
||
int filter)
|
||
{
|
||
const char *lineptr;
|
||
|
||
if (linebuffer == 0)
|
||
return;
|
||
|
||
/* Don't do any filtering if it is disabled. */
|
||
if (stream != gdb_stdout
|
||
|| !pagination_enabled
|
||
|| pagination_disabled_for_command
|
||
|| batch_flag
|
||
|| (lines_per_page == UINT_MAX && chars_per_line == UINT_MAX)
|
||
|| top_level_interpreter () == NULL
|
||
|| top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())
|
||
{
|
||
flush_wrap_buffer (stream);
|
||
stream->puts (linebuffer);
|
||
return;
|
||
}
|
||
|
||
auto buffer_clearer
|
||
= make_scope_exit ([&] ()
|
||
{
|
||
wrap_buffer.clear ();
|
||
wrap_column = 0;
|
||
wrap_indent = "";
|
||
});
|
||
|
||
/* Go through and output each character. Show line extension
|
||
when this is necessary; prompt user for new page when this is
|
||
necessary. */
|
||
|
||
lineptr = linebuffer;
|
||
while (*lineptr)
|
||
{
|
||
/* Possible new page. Note that PAGINATION_DISABLED_FOR_COMMAND
|
||
might be set during this loop, so we must continue to check
|
||
it here. */
|
||
if (filter && (lines_printed >= lines_per_page - 1)
|
||
&& !pagination_disabled_for_command)
|
||
prompt_for_continue ();
|
||
|
||
while (*lineptr && *lineptr != '\n')
|
||
{
|
||
int skip_bytes;
|
||
|
||
/* Print a single line. */
|
||
if (*lineptr == '\t')
|
||
{
|
||
wrap_buffer.push_back ('\t');
|
||
/* Shifting right by 3 produces the number of tab stops
|
||
we have already passed, and then adding one and
|
||
shifting left 3 advances to the next tab stop. */
|
||
chars_printed = ((chars_printed >> 3) + 1) << 3;
|
||
lineptr++;
|
||
}
|
||
else if (*lineptr == '\033'
|
||
&& skip_ansi_escape (lineptr, &skip_bytes))
|
||
{
|
||
wrap_buffer.append (lineptr, skip_bytes);
|
||
/* Note that we don't consider this a character, so we
|
||
don't increment chars_printed here. */
|
||
lineptr += skip_bytes;
|
||
}
|
||
else if (*lineptr == '\r')
|
||
{
|
||
wrap_buffer.push_back (*lineptr);
|
||
chars_printed = 0;
|
||
lineptr++;
|
||
}
|
||
else
|
||
{
|
||
wrap_buffer.push_back (*lineptr);
|
||
chars_printed++;
|
||
lineptr++;
|
||
}
|
||
|
||
if (chars_printed >= chars_per_line)
|
||
{
|
||
unsigned int save_chars = chars_printed;
|
||
|
||
/* If we change the style, below, we'll want to reset it
|
||
before continuing to print. If there is no wrap
|
||
column, then we'll only reset the style if the pager
|
||
prompt is given; and to avoid emitting style
|
||
sequences in the middle of a run of text, we track
|
||
this as well. */
|
||
ui_file_style save_style = applied_style;
|
||
bool did_paginate = false;
|
||
|
||
chars_printed = 0;
|
||
lines_printed++;
|
||
if (wrap_column)
|
||
{
|
||
/* We are about to insert a newline at an historic
|
||
location in the WRAP_BUFFER. Before we do we want to
|
||
restore the default style. To know if we actually
|
||
need to insert an escape sequence we must restore the
|
||
current applied style to how it was at the WRAP_COLUMN
|
||
location. */
|
||
applied_style = wrap_style;
|
||
if (stream->can_emit_style_escape ())
|
||
emit_style_escape (ui_file_style (), stream);
|
||
/* If we aren't actually wrapping, don't output
|
||
newline -- if chars_per_line is right, we
|
||
probably just overflowed anyway; if it's wrong,
|
||
let us keep going. */
|
||
/* XXX: The ideal thing would be to call
|
||
'stream->putc' here, but we can't because it
|
||
currently calls 'fputc_unfiltered', which ends up
|
||
calling us, which generates an infinite
|
||
recursion. */
|
||
stream->puts ("\n");
|
||
}
|
||
else
|
||
flush_wrap_buffer (stream);
|
||
|
||
/* Possible new page. Note that
|
||
PAGINATION_DISABLED_FOR_COMMAND might be set during
|
||
this loop, so we must continue to check it here. */
|
||
if (lines_printed >= lines_per_page - 1
|
||
&& !pagination_disabled_for_command)
|
||
{
|
||
prompt_for_continue ();
|
||
did_paginate = true;
|
||
}
|
||
|
||
/* Now output indentation and wrapped string. */
|
||
if (wrap_column)
|
||
{
|
||
stream->puts (wrap_indent);
|
||
|
||
/* Having finished inserting the wrapping we should
|
||
restore the style as it was at the WRAP_COLUMN. */
|
||
if (stream->can_emit_style_escape ())
|
||
emit_style_escape (wrap_style, stream);
|
||
|
||
/* The WRAP_BUFFER will still contain content, and that
|
||
content might set some alternative style. Restore
|
||
APPLIED_STYLE as it was before we started wrapping,
|
||
this reflects the current style for the last character
|
||
in WRAP_BUFFER. */
|
||
applied_style = save_style;
|
||
|
||
/* FIXME, this strlen is what prevents wrap_indent from
|
||
containing tabs. However, if we recurse to print it
|
||
and count its chars, we risk trouble if wrap_indent is
|
||
longer than (the user settable) chars_per_line.
|
||
Note also that this can set chars_printed > chars_per_line
|
||
if we are printing a long string. */
|
||
chars_printed = strlen (wrap_indent)
|
||
+ (save_chars - wrap_column);
|
||
wrap_column = 0; /* And disable fancy wrap */
|
||
}
|
||
else if (did_paginate && stream->can_emit_style_escape ())
|
||
emit_style_escape (save_style, stream);
|
||
}
|
||
}
|
||
|
||
if (*lineptr == '\n')
|
||
{
|
||
chars_printed = 0;
|
||
wrap_here ((char *) 0); /* Spit out chars, cancel
|
||
further wraps. */
|
||
lines_printed++;
|
||
/* XXX: The ideal thing would be to call
|
||
'stream->putc' here, but we can't because it
|
||
currently calls 'fputc_unfiltered', which ends up
|
||
calling us, which generates an infinite
|
||
recursion. */
|
||
stream->puts ("\n");
|
||
lineptr++;
|
||
}
|
||
}
|
||
|
||
buffer_clearer.release ();
|
||
}
|
||
|
||
void
|
||
fputs_filtered (const char *linebuffer, struct ui_file *stream)
|
||
{
|
||
fputs_maybe_filtered (linebuffer, stream, 1);
|
||
}
|
||
|
||
void
|
||
fputs_unfiltered (const char *linebuffer, struct ui_file *stream)
|
||
{
|
||
fputs_maybe_filtered (linebuffer, stream, 0);
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
fputs_styled (const char *linebuffer, const ui_file_style &style,
|
||
struct ui_file *stream)
|
||
{
|
||
set_output_style (stream, style);
|
||
fputs_maybe_filtered (linebuffer, stream, 1);
|
||
set_output_style (stream, ui_file_style ());
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
fputs_styled_unfiltered (const char *linebuffer, const ui_file_style &style,
|
||
struct ui_file *stream)
|
||
{
|
||
set_output_style (stream, style);
|
||
fputs_maybe_filtered (linebuffer, stream, 0);
|
||
set_output_style (stream, ui_file_style ());
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
fputs_highlighted (const char *str, const compiled_regex &highlight,
|
||
struct ui_file *stream)
|
||
{
|
||
regmatch_t pmatch;
|
||
|
||
while (*str && highlight.exec (str, 1, &pmatch, 0) == 0)
|
||
{
|
||
size_t n_highlight = pmatch.rm_eo - pmatch.rm_so;
|
||
|
||
/* Output the part before pmatch with current style. */
|
||
while (pmatch.rm_so > 0)
|
||
{
|
||
fputc_filtered (*str, stream);
|
||
pmatch.rm_so--;
|
||
str++;
|
||
}
|
||
|
||
/* Output pmatch with the highlight style. */
|
||
set_output_style (stream, highlight_style.style ());
|
||
while (n_highlight > 0)
|
||
{
|
||
fputc_filtered (*str, stream);
|
||
n_highlight--;
|
||
str++;
|
||
}
|
||
set_output_style (stream, ui_file_style ());
|
||
}
|
||
|
||
/* Output the trailing part of STR not matching HIGHLIGHT. */
|
||
if (*str)
|
||
fputs_filtered (str, stream);
|
||
}
|
||
|
||
int
|
||
putchar_unfiltered (int c)
|
||
{
|
||
return fputc_unfiltered (c, gdb_stdout);
|
||
}
|
||
|
||
/* Write character C to gdb_stdout using GDB's paging mechanism and return C.
|
||
May return nonlocally. */
|
||
|
||
int
|
||
putchar_filtered (int c)
|
||
{
|
||
return fputc_filtered (c, gdb_stdout);
|
||
}
|
||
|
||
int
|
||
fputc_unfiltered (int c, struct ui_file *stream)
|
||
{
|
||
char buf[2];
|
||
|
||
buf[0] = c;
|
||
buf[1] = 0;
|
||
fputs_unfiltered (buf, stream);
|
||
return c;
|
||
}
|
||
|
||
int
|
||
fputc_filtered (int c, struct ui_file *stream)
|
||
{
|
||
char buf[2];
|
||
|
||
buf[0] = c;
|
||
buf[1] = 0;
|
||
fputs_filtered (buf, stream);
|
||
return c;
|
||
}
|
||
|
||
/* Print a variable number of ARGS using format FORMAT. If this
|
||
information is going to put the amount written (since the last call
|
||
to REINITIALIZE_MORE_FILTER or the last page break) over the page size,
|
||
call prompt_for_continue to get the users permission to continue.
|
||
|
||
Unlike fprintf, this function does not return a value.
|
||
|
||
We implement three variants, vfprintf (takes a vararg list and stream),
|
||
fprintf (takes a stream to write on), and printf (the usual).
|
||
|
||
Note also that this may throw a quit (since prompt_for_continue may
|
||
do so). */
|
||
|
||
static void
|
||
vfprintf_maybe_filtered (struct ui_file *stream, const char *format,
|
||
va_list args, bool filter)
|
||
{
|
||
ui_out_flags flags = disallow_ui_out_field;
|
||
if (!filter)
|
||
flags |= unfiltered_output;
|
||
cli_ui_out (stream, flags).vmessage (applied_style, format, args);
|
||
}
|
||
|
||
|
||
void
|
||
vfprintf_filtered (struct ui_file *stream, const char *format, va_list args)
|
||
{
|
||
vfprintf_maybe_filtered (stream, format, args, true);
|
||
}
|
||
|
||
void
|
||
vfprintf_unfiltered (struct ui_file *stream, const char *format, va_list args)
|
||
{
|
||
if (debug_timestamp && stream == gdb_stdlog)
|
||
{
|
||
static bool needs_timestamp = true;
|
||
|
||
/* Print timestamp if previous print ended with a \n. */
|
||
if (needs_timestamp)
|
||
{
|
||
using namespace std::chrono;
|
||
|
||
steady_clock::time_point now = steady_clock::now ();
|
||
seconds s = duration_cast<seconds> (now.time_since_epoch ());
|
||
microseconds us = duration_cast<microseconds> (now.time_since_epoch () - s);
|
||
std::string timestamp = string_printf ("%ld.%06ld ",
|
||
(long) s.count (),
|
||
(long) us.count ());
|
||
fputs_unfiltered (timestamp.c_str (), stream);
|
||
}
|
||
|
||
/* Print the message. */
|
||
string_file sfile;
|
||
cli_ui_out (&sfile, 0).vmessage (ui_file_style (), format, args);
|
||
std::string linebuffer = std::move (sfile.string ());
|
||
fputs_unfiltered (linebuffer.c_str (), stream);
|
||
|
||
size_t len = linebuffer.length ();
|
||
needs_timestamp = (len > 0 && linebuffer[len - 1] == '\n');
|
||
}
|
||
else
|
||
vfprintf_maybe_filtered (stream, format, args, false);
|
||
}
|
||
|
||
void
|
||
vprintf_filtered (const char *format, va_list args)
|
||
{
|
||
vfprintf_filtered (gdb_stdout, format, args);
|
||
}
|
||
|
||
void
|
||
vprintf_unfiltered (const char *format, va_list args)
|
||
{
|
||
vfprintf_unfiltered (gdb_stdout, format, args);
|
||
}
|
||
|
||
void
|
||
fprintf_filtered (struct ui_file *stream, const char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, format);
|
||
vfprintf_filtered (stream, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
void
|
||
fprintf_unfiltered (struct ui_file *stream, const char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, format);
|
||
vfprintf_unfiltered (stream, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
fprintf_styled (struct ui_file *stream, const ui_file_style &style,
|
||
const char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
set_output_style (stream, style);
|
||
va_start (args, format);
|
||
vfprintf_filtered (stream, format, args);
|
||
va_end (args);
|
||
set_output_style (stream, ui_file_style ());
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
vfprintf_styled (struct ui_file *stream, const ui_file_style &style,
|
||
const char *format, va_list args)
|
||
{
|
||
set_output_style (stream, style);
|
||
vfprintf_filtered (stream, format, args);
|
||
set_output_style (stream, ui_file_style ());
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
vfprintf_styled_no_gdbfmt (struct ui_file *stream, const ui_file_style &style,
|
||
bool filter, const char *format, va_list args)
|
||
{
|
||
std::string str = string_vprintf (format, args);
|
||
if (!str.empty ())
|
||
{
|
||
set_output_style (stream, style);
|
||
fputs_maybe_filtered (str.c_str (), stream, filter);
|
||
set_output_style (stream, ui_file_style ());
|
||
}
|
||
}
|
||
|
||
void
|
||
printf_filtered (const char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, format);
|
||
vfprintf_filtered (gdb_stdout, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
|
||
void
|
||
printf_unfiltered (const char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, format);
|
||
vfprintf_unfiltered (gdb_stdout, format, args);
|
||
va_end (args);
|
||
}
|
||
|
||
/* Easy -- but watch out!
|
||
|
||
This routine is *not* a replacement for puts()! puts() appends a newline.
|
||
This one doesn't, and had better not! */
|
||
|
||
void
|
||
puts_filtered (const char *string)
|
||
{
|
||
fputs_filtered (string, gdb_stdout);
|
||
}
|
||
|
||
void
|
||
puts_unfiltered (const char *string)
|
||
{
|
||
fputs_unfiltered (string, gdb_stdout);
|
||
}
|
||
|
||
/* Return a pointer to N spaces and a null. The pointer is good
|
||
until the next call to here. */
|
||
const char *
|
||
n_spaces (int n)
|
||
{
|
||
char *t;
|
||
static char *spaces = 0;
|
||
static int max_spaces = -1;
|
||
|
||
if (n > max_spaces)
|
||
{
|
||
xfree (spaces);
|
||
spaces = (char *) xmalloc (n + 1);
|
||
for (t = spaces + n; t != spaces;)
|
||
*--t = ' ';
|
||
spaces[n] = '\0';
|
||
max_spaces = n;
|
||
}
|
||
|
||
return spaces + max_spaces - n;
|
||
}
|
||
|
||
/* Print N spaces. */
|
||
void
|
||
print_spaces_filtered (int n, struct ui_file *stream)
|
||
{
|
||
fputs_filtered (n_spaces (n), stream);
|
||
}
|
||
|
||
/* C++/ObjC demangler stuff. */
|
||
|
||
/* fprintf_symbol_filtered attempts to demangle NAME, a symbol in language
|
||
LANG, using demangling args ARG_MODE, and print it filtered to STREAM.
|
||
If the name is not mangled, or the language for the name is unknown, or
|
||
demangling is off, the name is printed in its "raw" form. */
|
||
|
||
void
|
||
fprintf_symbol_filtered (struct ui_file *stream, const char *name,
|
||
enum language lang, int arg_mode)
|
||
{
|
||
if (name != NULL)
|
||
{
|
||
/* If user wants to see raw output, no problem. */
|
||
if (!demangle)
|
||
{
|
||
fputs_filtered (name, stream);
|
||
}
|
||
else
|
||
{
|
||
gdb::unique_xmalloc_ptr<char> demangled
|
||
= language_demangle (language_def (lang), name, arg_mode);
|
||
fputs_filtered (demangled ? demangled.get () : name, stream);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* True if CH is a character that can be part of a symbol name. I.e.,
|
||
either a number, a letter, or a '_'. */
|
||
|
||
static bool
|
||
valid_identifier_name_char (int ch)
|
||
{
|
||
return (ISALNUM (ch) || ch == '_');
|
||
}
|
||
|
||
/* Skip to end of token, or to END, whatever comes first. Input is
|
||
assumed to be a C++ operator name. */
|
||
|
||
static const char *
|
||
cp_skip_operator_token (const char *token, const char *end)
|
||
{
|
||
const char *p = token;
|
||
while (p != end && !ISSPACE (*p) && *p != '(')
|
||
{
|
||
if (valid_identifier_name_char (*p))
|
||
{
|
||
while (p != end && valid_identifier_name_char (*p))
|
||
p++;
|
||
return p;
|
||
}
|
||
else
|
||
{
|
||
/* Note, ordered such that among ops that share a prefix,
|
||
longer comes first. This is so that the loop below can
|
||
bail on first match. */
|
||
static const char *ops[] =
|
||
{
|
||
"[",
|
||
"]",
|
||
"~",
|
||
",",
|
||
"-=", "--", "->", "-",
|
||
"+=", "++", "+",
|
||
"*=", "*",
|
||
"/=", "/",
|
||
"%=", "%",
|
||
"|=", "||", "|",
|
||
"&=", "&&", "&",
|
||
"^=", "^",
|
||
"!=", "!",
|
||
"<<=", "<=", "<<", "<",
|
||
">>=", ">=", ">>", ">",
|
||
"==", "=",
|
||
};
|
||
|
||
for (const char *op : ops)
|
||
{
|
||
size_t oplen = strlen (op);
|
||
size_t lencmp = std::min<size_t> (oplen, end - p);
|
||
|
||
if (strncmp (p, op, lencmp) == 0)
|
||
return p + lencmp;
|
||
}
|
||
/* Some unidentified character. Return it. */
|
||
return p + 1;
|
||
}
|
||
}
|
||
|
||
return p;
|
||
}
|
||
|
||
/* Advance STRING1/STRING2 past whitespace. */
|
||
|
||
static void
|
||
skip_ws (const char *&string1, const char *&string2, const char *end_str2)
|
||
{
|
||
while (ISSPACE (*string1))
|
||
string1++;
|
||
while (string2 < end_str2 && ISSPACE (*string2))
|
||
string2++;
|
||
}
|
||
|
||
/* True if STRING points at the start of a C++ operator name. START
|
||
is the start of the string that STRING points to, hence when
|
||
reading backwards, we must not read any character before START. */
|
||
|
||
static bool
|
||
cp_is_operator (const char *string, const char *start)
|
||
{
|
||
return ((string == start
|
||
|| !valid_identifier_name_char (string[-1]))
|
||
&& strncmp (string, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0
|
||
&& !valid_identifier_name_char (string[CP_OPERATOR_LEN]));
|
||
}
|
||
|
||
/* If *NAME points at an ABI tag, skip it and return true. Otherwise
|
||
leave *NAME unmodified and return false. (see GCC's abi_tag
|
||
attribute), such names are demangled as e.g.,
|
||
"function[abi:cxx11]()". */
|
||
|
||
static bool
|
||
skip_abi_tag (const char **name)
|
||
{
|
||
const char *p = *name;
|
||
|
||
if (startswith (p, "[abi:"))
|
||
{
|
||
p += 5;
|
||
|
||
while (valid_identifier_name_char (*p))
|
||
p++;
|
||
|
||
if (*p == ']')
|
||
{
|
||
p++;
|
||
*name = p;
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
int
|
||
strncmp_iw_with_mode (const char *string1, const char *string2,
|
||
size_t string2_len, strncmp_iw_mode mode,
|
||
enum language language,
|
||
completion_match_for_lcd *match_for_lcd)
|
||
{
|
||
const char *string1_start = string1;
|
||
const char *end_str2 = string2 + string2_len;
|
||
bool skip_spaces = true;
|
||
bool have_colon_op = (language == language_cplus
|
||
|| language == language_rust
|
||
|| language == language_fortran);
|
||
|
||
while (1)
|
||
{
|
||
if (skip_spaces
|
||
|| ((ISSPACE (*string1) && !valid_identifier_name_char (*string2))
|
||
|| (ISSPACE (*string2) && !valid_identifier_name_char (*string1))))
|
||
{
|
||
skip_ws (string1, string2, end_str2);
|
||
skip_spaces = false;
|
||
}
|
||
|
||
/* Skip [abi:cxx11] tags in the symbol name if the lookup name
|
||
doesn't include them. E.g.:
|
||
|
||
string1: function[abi:cxx1](int)
|
||
string2: function
|
||
|
||
string1: function[abi:cxx1](int)
|
||
string2: function(int)
|
||
|
||
string1: Struct[abi:cxx1]::function()
|
||
string2: Struct::function()
|
||
|
||
string1: function(Struct[abi:cxx1], int)
|
||
string2: function(Struct, int)
|
||
*/
|
||
if (string2 == end_str2
|
||
|| (*string2 != '[' && !valid_identifier_name_char (*string2)))
|
||
{
|
||
const char *abi_start = string1;
|
||
|
||
/* There can be more than one tag. */
|
||
while (*string1 == '[' && skip_abi_tag (&string1))
|
||
;
|
||
|
||
if (match_for_lcd != NULL && abi_start != string1)
|
||
match_for_lcd->mark_ignored_range (abi_start, string1);
|
||
|
||
while (ISSPACE (*string1))
|
||
string1++;
|
||
}
|
||
|
||
if (*string1 == '\0' || string2 == end_str2)
|
||
break;
|
||
|
||
/* Handle the :: operator. */
|
||
if (have_colon_op && string1[0] == ':' && string1[1] == ':')
|
||
{
|
||
if (*string2 != ':')
|
||
return 1;
|
||
|
||
string1++;
|
||
string2++;
|
||
|
||
if (string2 == end_str2)
|
||
break;
|
||
|
||
if (*string2 != ':')
|
||
return 1;
|
||
|
||
string1++;
|
||
string2++;
|
||
|
||
while (ISSPACE (*string1))
|
||
string1++;
|
||
while (string2 < end_str2 && ISSPACE (*string2))
|
||
string2++;
|
||
continue;
|
||
}
|
||
|
||
/* Handle C++ user-defined operators. */
|
||
else if (language == language_cplus
|
||
&& *string1 == 'o')
|
||
{
|
||
if (cp_is_operator (string1, string1_start))
|
||
{
|
||
/* An operator name in STRING1. Check STRING2. */
|
||
size_t cmplen
|
||
= std::min<size_t> (CP_OPERATOR_LEN, end_str2 - string2);
|
||
if (strncmp (string1, string2, cmplen) != 0)
|
||
return 1;
|
||
|
||
string1 += cmplen;
|
||
string2 += cmplen;
|
||
|
||
if (string2 != end_str2)
|
||
{
|
||
/* Check for "operatorX" in STRING2. */
|
||
if (valid_identifier_name_char (*string2))
|
||
return 1;
|
||
|
||
skip_ws (string1, string2, end_str2);
|
||
}
|
||
|
||
/* Handle operator(). */
|
||
if (*string1 == '(')
|
||
{
|
||
if (string2 == end_str2)
|
||
{
|
||
if (mode == strncmp_iw_mode::NORMAL)
|
||
return 0;
|
||
else
|
||
{
|
||
/* Don't break for the regular return at the
|
||
bottom, because "operator" should not
|
||
match "operator()", since this open
|
||
parentheses is not the parameter list
|
||
start. */
|
||
return *string1 != '\0';
|
||
}
|
||
}
|
||
|
||
if (*string1 != *string2)
|
||
return 1;
|
||
|
||
string1++;
|
||
string2++;
|
||
}
|
||
|
||
while (1)
|
||
{
|
||
skip_ws (string1, string2, end_str2);
|
||
|
||
/* Skip to end of token, or to END, whatever comes
|
||
first. */
|
||
const char *end_str1 = string1 + strlen (string1);
|
||
const char *p1 = cp_skip_operator_token (string1, end_str1);
|
||
const char *p2 = cp_skip_operator_token (string2, end_str2);
|
||
|
||
cmplen = std::min (p1 - string1, p2 - string2);
|
||
if (p2 == end_str2)
|
||
{
|
||
if (strncmp (string1, string2, cmplen) != 0)
|
||
return 1;
|
||
}
|
||
else
|
||
{
|
||
if (p1 - string1 != p2 - string2)
|
||
return 1;
|
||
if (strncmp (string1, string2, cmplen) != 0)
|
||
return 1;
|
||
}
|
||
|
||
string1 += cmplen;
|
||
string2 += cmplen;
|
||
|
||
if (*string1 == '\0' || string2 == end_str2)
|
||
break;
|
||
if (*string1 == '(' || *string2 == '(')
|
||
break;
|
||
}
|
||
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if (case_sensitivity == case_sensitive_on && *string1 != *string2)
|
||
break;
|
||
if (case_sensitivity == case_sensitive_off
|
||
&& (TOLOWER ((unsigned char) *string1)
|
||
!= TOLOWER ((unsigned char) *string2)))
|
||
break;
|
||
|
||
/* If we see any non-whitespace, non-identifier-name character
|
||
(any of "()<>*&" etc.), then skip spaces the next time
|
||
around. */
|
||
if (!ISSPACE (*string1) && !valid_identifier_name_char (*string1))
|
||
skip_spaces = true;
|
||
|
||
string1++;
|
||
string2++;
|
||
}
|
||
|
||
if (string2 == end_str2)
|
||
{
|
||
if (mode == strncmp_iw_mode::NORMAL)
|
||
{
|
||
/* Strip abi tag markers from the matched symbol name.
|
||
Usually the ABI marker will be found on function name
|
||
(automatically added because the function returns an
|
||
object marked with an ABI tag). However, it's also
|
||
possible to see a marker in one of the function
|
||
parameters, for example.
|
||
|
||
string2 (lookup name):
|
||
func
|
||
symbol name:
|
||
function(some_struct[abi:cxx11], int)
|
||
|
||
and for completion LCD computation we want to say that
|
||
the match was for:
|
||
function(some_struct, int)
|
||
*/
|
||
if (match_for_lcd != NULL)
|
||
{
|
||
while ((string1 = strstr (string1, "[abi:")) != NULL)
|
||
{
|
||
const char *abi_start = string1;
|
||
|
||
/* There can be more than one tag. */
|
||
while (skip_abi_tag (&string1) && *string1 == '[')
|
||
;
|
||
|
||
if (abi_start != string1)
|
||
match_for_lcd->mark_ignored_range (abi_start, string1);
|
||
}
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
else
|
||
return (*string1 != '\0' && *string1 != '(');
|
||
}
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
int
|
||
strncmp_iw (const char *string1, const char *string2, size_t string2_len)
|
||
{
|
||
return strncmp_iw_with_mode (string1, string2, string2_len,
|
||
strncmp_iw_mode::NORMAL, language_minimal);
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
int
|
||
strcmp_iw (const char *string1, const char *string2)
|
||
{
|
||
return strncmp_iw_with_mode (string1, string2, strlen (string2),
|
||
strncmp_iw_mode::MATCH_PARAMS, language_minimal);
|
||
}
|
||
|
||
/* This is like strcmp except that it ignores whitespace and treats
|
||
'(' as the first non-NULL character in terms of ordering. Like
|
||
strcmp (and unlike strcmp_iw), it returns negative if STRING1 <
|
||
STRING2, 0 if STRING2 = STRING2, and positive if STRING1 > STRING2
|
||
according to that ordering.
|
||
|
||
If a list is sorted according to this function and if you want to
|
||
find names in the list that match some fixed NAME according to
|
||
strcmp_iw(LIST_ELT, NAME), then the place to start looking is right
|
||
where this function would put NAME.
|
||
|
||
This function must be neutral to the CASE_SENSITIVITY setting as the user
|
||
may choose it during later lookup. Therefore this function always sorts
|
||
primarily case-insensitively and secondarily case-sensitively.
|
||
|
||
Here are some examples of why using strcmp to sort is a bad idea:
|
||
|
||
Whitespace example:
|
||
|
||
Say your partial symtab contains: "foo<char *>", "goo". Then, if
|
||
we try to do a search for "foo<char*>", strcmp will locate this
|
||
after "foo<char *>" and before "goo". Then lookup_partial_symbol
|
||
will start looking at strings beginning with "goo", and will never
|
||
see the correct match of "foo<char *>".
|
||
|
||
Parenthesis example:
|
||
|
||
In practice, this is less like to be an issue, but I'll give it a
|
||
shot. Let's assume that '$' is a legitimate character to occur in
|
||
symbols. (Which may well even be the case on some systems.) Then
|
||
say that the partial symbol table contains "foo$" and "foo(int)".
|
||
strcmp will put them in this order, since '$' < '('. Now, if the
|
||
user searches for "foo", then strcmp will sort "foo" before "foo$".
|
||
Then lookup_partial_symbol will notice that strcmp_iw("foo$",
|
||
"foo") is false, so it won't proceed to the actual match of
|
||
"foo(int)" with "foo". */
|
||
|
||
int
|
||
strcmp_iw_ordered (const char *string1, const char *string2)
|
||
{
|
||
const char *saved_string1 = string1, *saved_string2 = string2;
|
||
enum case_sensitivity case_pass = case_sensitive_off;
|
||
|
||
for (;;)
|
||
{
|
||
/* C1 and C2 are valid only if *string1 != '\0' && *string2 != '\0'.
|
||
Provide stub characters if we are already at the end of one of the
|
||
strings. */
|
||
char c1 = 'X', c2 = 'X';
|
||
|
||
while (*string1 != '\0' && *string2 != '\0')
|
||
{
|
||
while (ISSPACE (*string1))
|
||
string1++;
|
||
while (ISSPACE (*string2))
|
||
string2++;
|
||
|
||
switch (case_pass)
|
||
{
|
||
case case_sensitive_off:
|
||
c1 = TOLOWER ((unsigned char) *string1);
|
||
c2 = TOLOWER ((unsigned char) *string2);
|
||
break;
|
||
case case_sensitive_on:
|
||
c1 = *string1;
|
||
c2 = *string2;
|
||
break;
|
||
}
|
||
if (c1 != c2)
|
||
break;
|
||
|
||
if (*string1 != '\0')
|
||
{
|
||
string1++;
|
||
string2++;
|
||
}
|
||
}
|
||
|
||
switch (*string1)
|
||
{
|
||
/* Characters are non-equal unless they're both '\0'; we want to
|
||
make sure we get the comparison right according to our
|
||
comparison in the cases where one of them is '\0' or '('. */
|
||
case '\0':
|
||
if (*string2 == '\0')
|
||
break;
|
||
else
|
||
return -1;
|
||
case '(':
|
||
if (*string2 == '\0')
|
||
return 1;
|
||
else
|
||
return -1;
|
||
default:
|
||
if (*string2 == '\0' || *string2 == '(')
|
||
return 1;
|
||
else if (c1 > c2)
|
||
return 1;
|
||
else if (c1 < c2)
|
||
return -1;
|
||
/* PASSTHRU */
|
||
}
|
||
|
||
if (case_pass == case_sensitive_on)
|
||
return 0;
|
||
|
||
/* Otherwise the strings were equal in case insensitive way, make
|
||
a more fine grained comparison in a case sensitive way. */
|
||
|
||
case_pass = case_sensitive_on;
|
||
string1 = saved_string1;
|
||
string2 = saved_string2;
|
||
}
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
bool
|
||
streq (const char *lhs, const char *rhs)
|
||
{
|
||
return !strcmp (lhs, rhs);
|
||
}
|
||
|
||
|
||
|
||
/*
|
||
** subset_compare()
|
||
** Answer whether string_to_compare is a full or partial match to
|
||
** template_string. The partial match must be in sequence starting
|
||
** at index 0.
|
||
*/
|
||
int
|
||
subset_compare (const char *string_to_compare, const char *template_string)
|
||
{
|
||
int match;
|
||
|
||
if (template_string != NULL && string_to_compare != NULL
|
||
&& strlen (string_to_compare) <= strlen (template_string))
|
||
match =
|
||
(startswith (template_string, string_to_compare));
|
||
else
|
||
match = 0;
|
||
return match;
|
||
}
|
||
|
||
static void
|
||
show_debug_timestamp (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Timestamping debugging messages is %s.\n"),
|
||
value);
|
||
}
|
||
|
||
|
||
/* See utils.h. */
|
||
|
||
CORE_ADDR
|
||
address_significant (gdbarch *gdbarch, CORE_ADDR addr)
|
||
{
|
||
/* Clear insignificant bits of a target address and sign extend resulting
|
||
address, avoiding shifts larger or equal than the width of a CORE_ADDR.
|
||
The local variable ADDR_BIT stops the compiler reporting a shift overflow
|
||
when it won't occur. Skip updating of target address if current target
|
||
has not set gdbarch significant_addr_bit. */
|
||
int addr_bit = gdbarch_significant_addr_bit (gdbarch);
|
||
|
||
if (addr_bit && (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)))
|
||
{
|
||
CORE_ADDR sign = (CORE_ADDR) 1 << (addr_bit - 1);
|
||
addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
|
||
addr = (addr ^ sign) - sign;
|
||
}
|
||
|
||
return addr;
|
||
}
|
||
|
||
const char *
|
||
paddress (struct gdbarch *gdbarch, CORE_ADDR addr)
|
||
{
|
||
/* Truncate address to the size of a target address, avoiding shifts
|
||
larger or equal than the width of a CORE_ADDR. The local
|
||
variable ADDR_BIT stops the compiler reporting a shift overflow
|
||
when it won't occur. */
|
||
/* NOTE: This assumes that the significant address information is
|
||
kept in the least significant bits of ADDR - the upper bits were
|
||
either zero or sign extended. Should gdbarch_address_to_pointer or
|
||
some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
|
||
|
||
int addr_bit = gdbarch_addr_bit (gdbarch);
|
||
|
||
if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
|
||
addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
|
||
return hex_string (addr);
|
||
}
|
||
|
||
/* This function is described in "defs.h". */
|
||
|
||
const char *
|
||
print_core_address (struct gdbarch *gdbarch, CORE_ADDR address)
|
||
{
|
||
int addr_bit = gdbarch_addr_bit (gdbarch);
|
||
|
||
if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
|
||
address &= ((CORE_ADDR) 1 << addr_bit) - 1;
|
||
|
||
/* FIXME: cagney/2002-05-03: Need local_address_string() function
|
||
that returns the language localized string formatted to a width
|
||
based on gdbarch_addr_bit. */
|
||
if (addr_bit <= 32)
|
||
return hex_string_custom (address, 8);
|
||
else
|
||
return hex_string_custom (address, 16);
|
||
}
|
||
|
||
/* Callback hash_f for htab_create_alloc or htab_create_alloc_ex. */
|
||
|
||
hashval_t
|
||
core_addr_hash (const void *ap)
|
||
{
|
||
const CORE_ADDR *addrp = (const CORE_ADDR *) ap;
|
||
|
||
return *addrp;
|
||
}
|
||
|
||
/* Callback eq_f for htab_create_alloc or htab_create_alloc_ex. */
|
||
|
||
int
|
||
core_addr_eq (const void *ap, const void *bp)
|
||
{
|
||
const CORE_ADDR *addr_ap = (const CORE_ADDR *) ap;
|
||
const CORE_ADDR *addr_bp = (const CORE_ADDR *) bp;
|
||
|
||
return *addr_ap == *addr_bp;
|
||
}
|
||
|
||
/* Convert a string back into a CORE_ADDR. */
|
||
CORE_ADDR
|
||
string_to_core_addr (const char *my_string)
|
||
{
|
||
CORE_ADDR addr = 0;
|
||
|
||
if (my_string[0] == '0' && TOLOWER (my_string[1]) == 'x')
|
||
{
|
||
/* Assume that it is in hex. */
|
||
int i;
|
||
|
||
for (i = 2; my_string[i] != '\0'; i++)
|
||
{
|
||
if (ISDIGIT (my_string[i]))
|
||
addr = (my_string[i] - '0') + (addr * 16);
|
||
else if (ISXDIGIT (my_string[i]))
|
||
addr = (TOLOWER (my_string[i]) - 'a' + 0xa) + (addr * 16);
|
||
else
|
||
error (_("invalid hex \"%s\""), my_string);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Assume that it is in decimal. */
|
||
int i;
|
||
|
||
for (i = 0; my_string[i] != '\0'; i++)
|
||
{
|
||
if (ISDIGIT (my_string[i]))
|
||
addr = (my_string[i] - '0') + (addr * 10);
|
||
else
|
||
error (_("invalid decimal \"%s\""), my_string);
|
||
}
|
||
}
|
||
|
||
return addr;
|
||
}
|
||
|
||
#if GDB_SELF_TEST
|
||
|
||
static void
|
||
gdb_realpath_check_trailer (const char *input, const char *trailer)
|
||
{
|
||
gdb::unique_xmalloc_ptr<char> result = gdb_realpath (input);
|
||
|
||
size_t len = strlen (result.get ());
|
||
size_t trail_len = strlen (trailer);
|
||
|
||
SELF_CHECK (len >= trail_len
|
||
&& strcmp (result.get () + len - trail_len, trailer) == 0);
|
||
}
|
||
|
||
static void
|
||
gdb_realpath_tests ()
|
||
{
|
||
/* A file which contains a directory prefix. */
|
||
gdb_realpath_check_trailer ("./xfullpath.exp", "/xfullpath.exp");
|
||
/* A file which contains a directory prefix. */
|
||
gdb_realpath_check_trailer ("../../defs.h", "/defs.h");
|
||
/* A one-character filename. */
|
||
gdb_realpath_check_trailer ("./a", "/a");
|
||
/* A file in the root directory. */
|
||
gdb_realpath_check_trailer ("/root_file_which_should_exist",
|
||
"/root_file_which_should_exist");
|
||
/* A file which does not have a directory prefix. */
|
||
gdb_realpath_check_trailer ("xfullpath.exp", "xfullpath.exp");
|
||
/* A one-char filename without any directory prefix. */
|
||
gdb_realpath_check_trailer ("a", "a");
|
||
/* An empty filename. */
|
||
gdb_realpath_check_trailer ("", "");
|
||
}
|
||
|
||
/* Test the gdb_argv::as_array_view method. */
|
||
|
||
static void
|
||
gdb_argv_as_array_view_test ()
|
||
{
|
||
{
|
||
gdb_argv argv;
|
||
|
||
gdb::array_view<char *> view = argv.as_array_view ();
|
||
|
||
SELF_CHECK (view.data () == nullptr);
|
||
SELF_CHECK (view.size () == 0);
|
||
}
|
||
{
|
||
gdb_argv argv ("une bonne 50");
|
||
|
||
gdb::array_view<char *> view = argv.as_array_view ();
|
||
|
||
SELF_CHECK (view.size () == 3);
|
||
SELF_CHECK (strcmp (view[0], "une") == 0);
|
||
SELF_CHECK (strcmp (view[1], "bonne") == 0);
|
||
SELF_CHECK (strcmp (view[2], "50") == 0);
|
||
}
|
||
}
|
||
|
||
#endif /* GDB_SELF_TEST */
|
||
|
||
/* Allocation function for the libiberty hash table which uses an
|
||
obstack. The obstack is passed as DATA. */
|
||
|
||
void *
|
||
hashtab_obstack_allocate (void *data, size_t size, size_t count)
|
||
{
|
||
size_t total = size * count;
|
||
void *ptr = obstack_alloc ((struct obstack *) data, total);
|
||
|
||
memset (ptr, 0, total);
|
||
return ptr;
|
||
}
|
||
|
||
/* Trivial deallocation function for the libiberty splay tree and hash
|
||
table - don't deallocate anything. Rely on later deletion of the
|
||
obstack. DATA will be the obstack, although it is not needed
|
||
here. */
|
||
|
||
void
|
||
dummy_obstack_deallocate (void *object, void *data)
|
||
{
|
||
return;
|
||
}
|
||
|
||
/* Simple, portable version of dirname that does not modify its
|
||
argument. */
|
||
|
||
std::string
|
||
ldirname (const char *filename)
|
||
{
|
||
std::string dirname;
|
||
const char *base = lbasename (filename);
|
||
|
||
while (base > filename && IS_DIR_SEPARATOR (base[-1]))
|
||
--base;
|
||
|
||
if (base == filename)
|
||
return dirname;
|
||
|
||
dirname = std::string (filename, base - filename);
|
||
|
||
/* On DOS based file systems, convert "d:foo" to "d:.", so that we
|
||
create "d:./bar" later instead of the (different) "d:/bar". */
|
||
if (base - filename == 2 && IS_ABSOLUTE_PATH (base)
|
||
&& !IS_DIR_SEPARATOR (filename[0]))
|
||
dirname[base++ - filename] = '.';
|
||
|
||
return dirname;
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
gdb_argv::reset (const char *s)
|
||
{
|
||
char **argv = buildargv (s);
|
||
|
||
freeargv (m_argv);
|
||
m_argv = argv;
|
||
}
|
||
|
||
/* Return ARGS parsed as a valid pid, or throw an error. */
|
||
|
||
int
|
||
parse_pid_to_attach (const char *args)
|
||
{
|
||
unsigned long pid;
|
||
char *dummy;
|
||
|
||
if (!args)
|
||
error_no_arg (_("process-id to attach"));
|
||
|
||
dummy = (char *) args;
|
||
pid = strtoul (args, &dummy, 0);
|
||
/* Some targets don't set errno on errors, grrr! */
|
||
if ((pid == 0 && dummy == args) || dummy != &args[strlen (args)])
|
||
error (_("Illegal process-id: %s."), args);
|
||
|
||
return pid;
|
||
}
|
||
|
||
/* Substitute all occurrences of string FROM by string TO in *STRINGP. *STRINGP
|
||
must come from xrealloc-compatible allocator and it may be updated. FROM
|
||
needs to be delimited by IS_DIR_SEPARATOR or DIRNAME_SEPARATOR (or be
|
||
located at the start or end of *STRINGP. */
|
||
|
||
void
|
||
substitute_path_component (char **stringp, const char *from, const char *to)
|
||
{
|
||
char *string = *stringp, *s;
|
||
const size_t from_len = strlen (from);
|
||
const size_t to_len = strlen (to);
|
||
|
||
for (s = string;;)
|
||
{
|
||
s = strstr (s, from);
|
||
if (s == NULL)
|
||
break;
|
||
|
||
if ((s == string || IS_DIR_SEPARATOR (s[-1])
|
||
|| s[-1] == DIRNAME_SEPARATOR)
|
||
&& (s[from_len] == '\0' || IS_DIR_SEPARATOR (s[from_len])
|
||
|| s[from_len] == DIRNAME_SEPARATOR))
|
||
{
|
||
char *string_new;
|
||
|
||
string_new
|
||
= (char *) xrealloc (string, (strlen (string) + to_len + 1));
|
||
|
||
/* Relocate the current S pointer. */
|
||
s = s - string + string_new;
|
||
string = string_new;
|
||
|
||
/* Replace from by to. */
|
||
memmove (&s[to_len], &s[from_len], strlen (&s[from_len]) + 1);
|
||
memcpy (s, to, to_len);
|
||
|
||
s += to_len;
|
||
}
|
||
else
|
||
s++;
|
||
}
|
||
|
||
*stringp = string;
|
||
}
|
||
|
||
#ifdef HAVE_WAITPID
|
||
|
||
#ifdef SIGALRM
|
||
|
||
/* SIGALRM handler for waitpid_with_timeout. */
|
||
|
||
static void
|
||
sigalrm_handler (int signo)
|
||
{
|
||
/* Nothing to do. */
|
||
}
|
||
|
||
#endif
|
||
|
||
/* Wrapper to wait for child PID to die with TIMEOUT.
|
||
TIMEOUT is the time to stop waiting in seconds.
|
||
If TIMEOUT is zero, pass WNOHANG to waitpid.
|
||
Returns PID if it was successfully waited for, otherwise -1.
|
||
|
||
Timeouts are currently implemented with alarm and SIGALRM.
|
||
If the host does not support them, this waits "forever".
|
||
It would be odd though for a host to have waitpid and not SIGALRM. */
|
||
|
||
pid_t
|
||
wait_to_die_with_timeout (pid_t pid, int *status, int timeout)
|
||
{
|
||
pid_t waitpid_result;
|
||
|
||
gdb_assert (pid > 0);
|
||
gdb_assert (timeout >= 0);
|
||
|
||
if (timeout > 0)
|
||
{
|
||
#ifdef SIGALRM
|
||
#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
|
||
struct sigaction sa, old_sa;
|
||
|
||
sa.sa_handler = sigalrm_handler;
|
||
sigemptyset (&sa.sa_mask);
|
||
sa.sa_flags = 0;
|
||
sigaction (SIGALRM, &sa, &old_sa);
|
||
#else
|
||
sighandler_t ofunc;
|
||
|
||
ofunc = signal (SIGALRM, sigalrm_handler);
|
||
#endif
|
||
|
||
alarm (timeout);
|
||
#endif
|
||
|
||
waitpid_result = waitpid (pid, status, 0);
|
||
|
||
#ifdef SIGALRM
|
||
alarm (0);
|
||
#if defined (HAVE_SIGACTION) && defined (SA_RESTART)
|
||
sigaction (SIGALRM, &old_sa, NULL);
|
||
#else
|
||
signal (SIGALRM, ofunc);
|
||
#endif
|
||
#endif
|
||
}
|
||
else
|
||
waitpid_result = waitpid (pid, status, WNOHANG);
|
||
|
||
if (waitpid_result == pid)
|
||
return pid;
|
||
else
|
||
return -1;
|
||
}
|
||
|
||
#endif /* HAVE_WAITPID */
|
||
|
||
/* Provide fnmatch compatible function for FNM_FILE_NAME matching of host files.
|
||
Both FNM_FILE_NAME and FNM_NOESCAPE must be set in FLAGS.
|
||
|
||
It handles correctly HAVE_DOS_BASED_FILE_SYSTEM and
|
||
HAVE_CASE_INSENSITIVE_FILE_SYSTEM. */
|
||
|
||
int
|
||
gdb_filename_fnmatch (const char *pattern, const char *string, int flags)
|
||
{
|
||
gdb_assert ((flags & FNM_FILE_NAME) != 0);
|
||
|
||
/* It is unclear how '\' escaping vs. directory separator should coexist. */
|
||
gdb_assert ((flags & FNM_NOESCAPE) != 0);
|
||
|
||
#ifdef HAVE_DOS_BASED_FILE_SYSTEM
|
||
{
|
||
char *pattern_slash, *string_slash;
|
||
|
||
/* Replace '\' by '/' in both strings. */
|
||
|
||
pattern_slash = (char *) alloca (strlen (pattern) + 1);
|
||
strcpy (pattern_slash, pattern);
|
||
pattern = pattern_slash;
|
||
for (; *pattern_slash != 0; pattern_slash++)
|
||
if (IS_DIR_SEPARATOR (*pattern_slash))
|
||
*pattern_slash = '/';
|
||
|
||
string_slash = (char *) alloca (strlen (string) + 1);
|
||
strcpy (string_slash, string);
|
||
string = string_slash;
|
||
for (; *string_slash != 0; string_slash++)
|
||
if (IS_DIR_SEPARATOR (*string_slash))
|
||
*string_slash = '/';
|
||
}
|
||
#endif /* HAVE_DOS_BASED_FILE_SYSTEM */
|
||
|
||
#ifdef HAVE_CASE_INSENSITIVE_FILE_SYSTEM
|
||
flags |= FNM_CASEFOLD;
|
||
#endif /* HAVE_CASE_INSENSITIVE_FILE_SYSTEM */
|
||
|
||
return fnmatch (pattern, string, flags);
|
||
}
|
||
|
||
/* Return the number of path elements in PATH.
|
||
/ = 1
|
||
/foo = 2
|
||
/foo/ = 2
|
||
foo/bar = 2
|
||
foo/ = 1 */
|
||
|
||
int
|
||
count_path_elements (const char *path)
|
||
{
|
||
int count = 0;
|
||
const char *p = path;
|
||
|
||
if (HAS_DRIVE_SPEC (p))
|
||
{
|
||
p = STRIP_DRIVE_SPEC (p);
|
||
++count;
|
||
}
|
||
|
||
while (*p != '\0')
|
||
{
|
||
if (IS_DIR_SEPARATOR (*p))
|
||
++count;
|
||
++p;
|
||
}
|
||
|
||
/* Backup one if last character is /, unless it's the only one. */
|
||
if (p > path + 1 && IS_DIR_SEPARATOR (p[-1]))
|
||
--count;
|
||
|
||
/* Add one for the file name, if present. */
|
||
if (p > path && !IS_DIR_SEPARATOR (p[-1]))
|
||
++count;
|
||
|
||
return count;
|
||
}
|
||
|
||
/* Remove N leading path elements from PATH.
|
||
N must be non-negative.
|
||
If PATH has more than N path elements then return NULL.
|
||
If PATH has exactly N path elements then return "".
|
||
See count_path_elements for a description of how we do the counting. */
|
||
|
||
const char *
|
||
strip_leading_path_elements (const char *path, int n)
|
||
{
|
||
int i = 0;
|
||
const char *p = path;
|
||
|
||
gdb_assert (n >= 0);
|
||
|
||
if (n == 0)
|
||
return p;
|
||
|
||
if (HAS_DRIVE_SPEC (p))
|
||
{
|
||
p = STRIP_DRIVE_SPEC (p);
|
||
++i;
|
||
}
|
||
|
||
while (i < n)
|
||
{
|
||
while (*p != '\0' && !IS_DIR_SEPARATOR (*p))
|
||
++p;
|
||
if (*p == '\0')
|
||
{
|
||
if (i + 1 == n)
|
||
return "";
|
||
return NULL;
|
||
}
|
||
++p;
|
||
++i;
|
||
}
|
||
|
||
return p;
|
||
}
|
||
|
||
/* See utils.h. */
|
||
|
||
void
|
||
copy_bitwise (gdb_byte *dest, ULONGEST dest_offset,
|
||
const gdb_byte *source, ULONGEST source_offset,
|
||
ULONGEST nbits, int bits_big_endian)
|
||
{
|
||
unsigned int buf, avail;
|
||
|
||
if (nbits == 0)
|
||
return;
|
||
|
||
if (bits_big_endian)
|
||
{
|
||
/* Start from the end, then work backwards. */
|
||
dest_offset += nbits - 1;
|
||
dest += dest_offset / 8;
|
||
dest_offset = 7 - dest_offset % 8;
|
||
source_offset += nbits - 1;
|
||
source += source_offset / 8;
|
||
source_offset = 7 - source_offset % 8;
|
||
}
|
||
else
|
||
{
|
||
dest += dest_offset / 8;
|
||
dest_offset %= 8;
|
||
source += source_offset / 8;
|
||
source_offset %= 8;
|
||
}
|
||
|
||
/* Fill BUF with DEST_OFFSET bits from the destination and 8 -
|
||
SOURCE_OFFSET bits from the source. */
|
||
buf = *(bits_big_endian ? source-- : source++) >> source_offset;
|
||
buf <<= dest_offset;
|
||
buf |= *dest & ((1 << dest_offset) - 1);
|
||
|
||
/* NBITS: bits yet to be written; AVAIL: BUF's fill level. */
|
||
nbits += dest_offset;
|
||
avail = dest_offset + 8 - source_offset;
|
||
|
||
/* Flush 8 bits from BUF, if appropriate. */
|
||
if (nbits >= 8 && avail >= 8)
|
||
{
|
||
*(bits_big_endian ? dest-- : dest++) = buf;
|
||
buf >>= 8;
|
||
avail -= 8;
|
||
nbits -= 8;
|
||
}
|
||
|
||
/* Copy the middle part. */
|
||
if (nbits >= 8)
|
||
{
|
||
size_t len = nbits / 8;
|
||
|
||
/* Use a faster method for byte-aligned copies. */
|
||
if (avail == 0)
|
||
{
|
||
if (bits_big_endian)
|
||
{
|
||
dest -= len;
|
||
source -= len;
|
||
memcpy (dest + 1, source + 1, len);
|
||
}
|
||
else
|
||
{
|
||
memcpy (dest, source, len);
|
||
dest += len;
|
||
source += len;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
while (len--)
|
||
{
|
||
buf |= *(bits_big_endian ? source-- : source++) << avail;
|
||
*(bits_big_endian ? dest-- : dest++) = buf;
|
||
buf >>= 8;
|
||
}
|
||
}
|
||
nbits %= 8;
|
||
}
|
||
|
||
/* Write the last byte. */
|
||
if (nbits)
|
||
{
|
||
if (avail < nbits)
|
||
buf |= *source << avail;
|
||
|
||
buf &= (1 << nbits) - 1;
|
||
*dest = (*dest & (~0U << nbits)) | buf;
|
||
}
|
||
}
|
||
|
||
void _initialize_utils ();
|
||
void
|
||
_initialize_utils ()
|
||
{
|
||
add_setshow_uinteger_cmd ("width", class_support, &chars_per_line, _("\
|
||
Set number of characters where GDB should wrap lines of its output."), _("\
|
||
Show number of characters where GDB should wrap lines of its output."), _("\
|
||
This affects where GDB wraps its output to fit the screen width.\n\
|
||
Setting this to \"unlimited\" or zero prevents GDB from wrapping its output."),
|
||
set_width_command,
|
||
show_chars_per_line,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_uinteger_cmd ("height", class_support, &lines_per_page, _("\
|
||
Set number of lines in a page for GDB output pagination."), _("\
|
||
Show number of lines in a page for GDB output pagination."), _("\
|
||
This affects the number of lines after which GDB will pause\n\
|
||
its output and ask you whether to continue.\n\
|
||
Setting this to \"unlimited\" or zero causes GDB never pause during output."),
|
||
set_height_command,
|
||
show_lines_per_page,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_boolean_cmd ("pagination", class_support,
|
||
&pagination_enabled, _("\
|
||
Set state of GDB output pagination."), _("\
|
||
Show state of GDB output pagination."), _("\
|
||
When pagination is ON, GDB pauses at end of each screenful of\n\
|
||
its output and asks you whether to continue.\n\
|
||
Turning pagination off is an alternative to \"set height unlimited\"."),
|
||
NULL,
|
||
show_pagination_enabled,
|
||
&setlist, &showlist);
|
||
|
||
add_setshow_boolean_cmd ("sevenbit-strings", class_support,
|
||
&sevenbit_strings, _("\
|
||
Set printing of 8-bit characters in strings as \\nnn."), _("\
|
||
Show printing of 8-bit characters in strings as \\nnn."), NULL,
|
||
NULL,
|
||
show_sevenbit_strings,
|
||
&setprintlist, &showprintlist);
|
||
|
||
add_setshow_boolean_cmd ("timestamp", class_maintenance,
|
||
&debug_timestamp, _("\
|
||
Set timestamping of debugging messages."), _("\
|
||
Show timestamping of debugging messages."), _("\
|
||
When set, debugging messages will be marked with seconds and microseconds."),
|
||
NULL,
|
||
show_debug_timestamp,
|
||
&setdebuglist, &showdebuglist);
|
||
|
||
add_internal_problem_command (&internal_error_problem);
|
||
add_internal_problem_command (&internal_warning_problem);
|
||
add_internal_problem_command (&demangler_warning_problem);
|
||
|
||
#if GDB_SELF_TEST
|
||
selftests::register_test ("gdb_realpath", gdb_realpath_tests);
|
||
selftests::register_test ("gdb_argv_array_view", gdb_argv_as_array_view_test);
|
||
#endif
|
||
}
|